Latex Bibliography Not Cited But At Fault

When it comes to bibliography management packages, there are three main options in LaTeX: bibtex, natbib and biblatex. Biblatex is a modern program to process bibliography information, provides an easier and more flexible interface and a better language localization that the other two options. This article explains how to use biblatex to manage and format the bibliography in a LaTeX document.

[edit]Introduction

A minimal working example of the biblatex package is shown below:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{biblatex}\addbibresource{sample.bib}   \begin{document} Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items.   \printbibliography   \end{document}

There are four bibliography-related commands in this example:

Imports the package biblatex.
Imports the bibtex data file sample.bib, this file is the one that includes information about each referenced book, article, etc. See the bibliography file section for more information.
This command inserts a reference within the document, [1] in this case, that corresponds to an element in the bibliography, "einstein" is a keyword corresponding to an entry in sample.bib.
Prints the list of cited references, the default title is "References" for the article document class and "Bibliography" for books and reports.

ShareLaTeX provides several templates with pre-defined styles to manage bibliography. See this link

  Open an example of the biblatex package in ShareLaTeX

[edit]Basic usage

Several parameters can be passed to the package import command, as in the following example:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{comment}   \usepackage[ backend=biber, style=alphabetic, sorting=ynt ]{biblatex}\addbibresource{sample.bib}   \title{Bibliography management: \texttt{biblatex} package}\author{Share\LaTeX}\date{}   \begin{document}   \maketitle   Using \texttt{biblatex} you can display bibliography divided into sections, depending of citation type. Let's cite! Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items. Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated to programming.   \medskip   \printbibliography   \end{document}

Some extra options, inside brackets and comma-separated, are added when importing biblatex:

Sets the backend to sort the bibliography, is the default one and recommended since it provides full localization for several commands and the styles for biber are easier to modify because they use standard LaTeX macros. The other supported backend is , which is a more traditional program; if set as the backend, bibtex will only be used to sort the bibliography, so no bibtex styles can be used here.
Defines the bibliography style and the citation style, in this case . Depending on the style, more citation commands might be available. See biblatex bibliography styles and citation styles for more information.
Determines the criteria to sort the bibliographic sources. In this case they are sorted by year, name and title. See the reference guide for a list of sorting options.

The rest of the commands were explained in the introduction.

  Open an example of the biblatex package in ShareLaTeX

[edit]The bibliography file

The bibliography files must have the standard bibtex syntax

This file contains records in a special format, for instance, the first bibliographic reference is defined by:

This is the first line of a record entry, tells BibTeX that the information stored here is about an article. The information about this entry is enclosed within braces. Besides the entry types shown in the example (, , and ) there are a lot more, see the reference guide.
The label is assigned to this entry, is a unique identifier that can be used to refer this article within the document.
This is the first field in the bibliography entry, indicates that the author of this article is Albert Einstein. Several comma-separated fields can be added using the same syntax , for instance: title, pages, year, URL, etc. See the reference guide for a list of possible fields.

The information in this file can later be printed and referenced within a LaTeX document, as shown in the previous sections, with the command . Not all the information in the .bib file will be displayed, it depends on the bibliography style set in the document.

  Open an example of the biblatex package in ShareLaTeX

[edit]Customizing the bibliography

Biblatex allows high customization of the bibliography section with little effort. It was mentioned that several citation styles and bibliography styles are available, and you can also create new ones. Another customization option is to change the default title of the bibliography section.

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{comment}   \usepackage[ backend=biber, style=alphabetic, sorting=ynt ]{biblatex}\addbibresource{sample.bib}   \title{Bibliography management: \texttt{biblatex} package}\author{Share\LaTeX}\date{}   \begin{document}   \maketitle   Using \texttt{biblatex} you can display bibliography divided into sections, depending of citation type. Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items. Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated to programming.   \medskip   \printbibliography[title={Whole bibliography}]

The additional parameter passed inside brackets to the command is the one that changes the title.

The bibliography can also be subdivided into sections based on different filters, for instance: print only references from the same author, the same journal or similar title. Below an example.

\printbibliography[type=article,title={Articles only}]\printbibliography[type=book,title={Books only}]   \printbibliography[keyword={physics},title={Physics-related only}]\printbibliography[keyword={latex},title={\LaTeX-related only}]

Here, the bibliography is divided in 4 sections. The syntax of the commands used here is explained below:

Only prints entries whose type is "article", and sets the title "Articles only" for this section. The same syntax works for any other entry type.
Filters bibliography entries that include the word "physics" in any of the fields. Sets the title "Physics-related only" for said section.

  Open an example of the biblatex package in ShareLaTeX

[edit]Adding the bibliography in the table of contents

For the bibliography the be printed in the table of contents an extra option must be passed to

\printbibliography[ heading=bibintoc, title={Whole bibliography} ]   \printbibliography[heading=subbibintoc,type=article,title={Articles only}]

A section and a subsection are added to the table of contents:

  • In the first case, adding adds the title to the table of contents as an unnumbered chapter if possible or as an unnumbered section otherwise.
  • The second case is that adds the title as a second level entry in the table of contents, in this example as a subsection nested in "Whole bibliography".

  Open an example of the biblatex package in ShareLaTeX

[edit]Reference guide

Supported entry types

article book mvbook
inbook bookinbook suppbook
booklet collection mvcollection
incollection suppcollection manual
misc online patent
periodical suppperiodical proceedings
mvproceedings inproceedings reference
mvreference inreference report
set thesis unpublished
custom conference electronic
masterthesis phdthesis techreport

Supported entry fields (The printed information depends on the bibliography style)

abstract addendum afterword annotate
author authortype bookauthor bookpagination
booksubtitle booktitle chapter commentator
date doi edition editor
editortype eid entrysubtype eprint
eprinttype eprintclass eventdate eventtitle
file foreword holder howpublished
indextitle institution introduction isan
isbn ismn isrn issue
issuesubtitle issuetitle iswc journalsubtitle
journaltitle label language library
location mainsubtitle maintitle month
note number organization origdate
origlanguage origlocation origpublisher origtitle
pages pagetotal pagination part
publisher pubstate reprinttitle series
shortauthor shortedition shorthand shorthandintro
shortjournal shortseries shorttitle subtitle
title translator type url
venue version volume year

Bibliography sorting options

option description
sort by name, title, year
sort by name, year, title
sort by name, year, volume, title
sort by alphabetic label, name, year, title
sort by alphabetic label, name, year, volume, title
sort by year (descending), name, title
entries are processed in citation order

For detailed information on these entries and options, see the package documentation.

[edit]Further reading

For more information see

@article{einstein, author = "Albert Einstein", title = "{Zur Elektrodynamik bewegter K{\"o}rper}. ({German}) [{On} the electrodynamics of moving bodies]", journal = "Annalen der Physik", volume = "322", number = "10", pages = "891--921", year = "1905", DOI = "http://dx.doi.org/10.1002/andp.19053221004", keywords = "physics" }   @book{dirac, title = {The Principles of Quantum Mechanics}, author = {Paul Adrien Maurice Dirac}, isbn = {9780198520115}, series = {International series of monographs on physics}, year = {1981}, publisher = {Clarendon Press}, keywords = {physics} }   @online{knuthwebsite, author = "Donald Knuth", title = "Knuth: Computers and Typesetting", url = "http://www-cs-faculty.stanford.edu/~uno/abcde.html", addendum = "(accessed: 01.09.2016)", keywords = "latex,knuth" }   @inbook{knuth-fa, author = "Donald E. Knuth", title = "Fundamental Algorithms", publisher = "Addison-Wesley", year = "1973", chapter = "1.2", keywords = "knuth,programming" } ...

It's possible to include references in ShareLaTeX using all major bibliographies management programs: biblatex, natbib and bibtex. This article explains how to create a .bib bibliography database file from scratch, how to upload and existing one and how to create one from a template.

[edit] Creating your bibliography database

To create a new bibliography file in ShareLaTeX, in the editor, click New File icon .

an input box will appear for you to set the name of the new file. The file should have the .bib extension, in this example is called "mybibliography.bib"; now click on Create.

A new file will be listed in the left panel, click it to edit its contents. Add your bibliography entries there.

Now you can import this .bib file in the main .tex file. See the next example

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage[ backend=biber, style=alphabetic, sorting=ynt ]{biblatex}   \addbibresource{mybibliography.bib}   \title{Bibliography management: \texttt{biblatex} package}\author{Share\LaTeX}\date{}   \begin{document}   \maketitle   \section{First section}   Using \texttt{biblatex} you can display bibliography divided into sections, depending of citation type. Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items. Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated to programming.   \medskip   \printbibliography\end{document}

The command adds the created bibliography file to the document so you can use those references. See Bibliography management in LaTeX for more information about bibliography management.

[edit] Uploading your bibliography database

If you already have a bibliography file that you need to use in a ShareLaTeX project, you can upload it. Click the Upload icon on top of the the left panel.

A dialogue box will appear, you can either drag and drop the .bib file or click Select file(s) to navigate to the location of your file.

Once the upload process is finished you can include the .bib file in your main .tex document. See the last example in the previous section.

[edit] Using a template

ShareLaTeX provides a vast set of templates for almost all kind of LaTeX documents, they include several bibliography-related ones.

If you are in the editor view, click the "Back to projects" icon to go to the Projects view.

In the the Project Management view click the button New Project, then in the drop-down menu that will appear click Bibliographies.

You will be redirected to a list of bibliography templates

click the one you prefer, in the next page click Open in ShareLaTeX:

The template will open in the ShareLaTeX editor so you can start working on it.

[edit] Quick guides

  • Creating a bibliography file from scratch. In editor, on the upper left corner click the New file icon then enter the name for your new file with extension .bib and click Create. You can now start editing you file.
  • Uploading your bibliography database. To upload an existing .bib file click the Upload icon . Drag and drop your file in the dialogue box and wait for your file(s) to be uploaded. After that you can use your .bib within the document.
  • Using a template. In the Project Management page click New Project => Bibliographies you will be redirected to the Templates page, select the one you need and then click Open in ShareLaTeX

[edit] Supported bibliography packages

For more information about bibliography management in LaTeX see.

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