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How do I print any field from a .bib file?

For example how do I print the title from the following entry?

@article{Gerace2019,

Author = {Gerace, Dario and Laussy, Fabrice and Sanvitto, Daniele},

Journal = {Nature Materials},

Number = {3},

Pages = {200--201},

Title = {Quantum nonlinearities at the single-particle level},

Volume = {18},

Year = {2019}

}

I want to do something like:

The title of the paper cite{Gerace2019} is printtitle{Gerace2019}

If you are using biblatex the command you are looking for is called citetitle.

For the most common fields biblatex has dedicated cite... commands (citeauthor, citetitle, citedate, cityear, citeurl) if the field you want to print is not amongst those, then you can use the generic citefield{<key>}{<field>}. Since biblatex differentiates between fields, lists and name lists, there are citefield, citelist and citename, see also How to extract BibTeX entries (as DOI, abstract, etc.). It is possible to create your own cite... command for fields that don't have one yet (see also the previous link).

documentclass[british]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{babel}

usepackage{csquotes}



usepackage[style=numeric, backend=biber]{biblatex}



%usepackage{filecontents}

begin{filecontents}{jobname.bib}

@article{Gerace2019,

  author  = {Gerace, Dario and Laussy, Fabrice and Sanvitto, Daniele},

  journal = {Nature Materials},

  number  = {3},

  pages   = {200--201},

  title   = {Quantum nonlinearities at the single-particle level},

  volume  = {18},

  year    = {2019},

}

end{filecontents}



addbibresource{jobname.bib}





begin{document}

The title of the paper cite{Gerace2019} is citetitle{Gerace2019}

printbibliography

end{document}

If you are using a BibTeX-based solution, you can load the usebib package and use its usebibentry command.

Note that usebib does not parse the field contents like BibTeX or Biber. In particular, name lists and other lists are not split up as usual. That means that it is possible to display name fields like author with usebib the output will look exactly as the input in the .bib file.

documentclass[british]{article}

usepackage[T1]{fontenc}

usepackage[utf8]{inputenc}

usepackage{babel}

usepackage{csquotes}



usepackage{usebib}





%usepackage{filecontents}

begin{filecontents}{jobname.bib}

@article{Gerace2019,

  author  = {Gerace, Dario and Laussy, Fabrice and Sanvitto, Daniele},

  journal = {Nature Materials},

  number  = {3},

  pages   = {200--201},

  title   = {Quantum nonlinearities at the single-particle level},

  volume  = {18},

  year    = {2019},

}

end{filecontents}



bibinput{jobname} % give the file name of your .bib file here (without extension)

                    % just as in bibliography



begin{document}

The title of the paper cite{Gerace2019} is usebibentry{Gerace2019}{title}

bibliographystyle{plain}

bibliography{jobname}

end{document}