# BibLatex: two bibliographies with roman and arabic numbering

The answer to Jannik's question (Biblatex: Two bibliographies with different styles and sortings) is almost what I like to have. But instead of style=alphabetic I would like to use style=phys and have bolded roman numerals as labels in the first bibliography and corresponding in-text citations. (i.e. replace [Bbb02] with {\bf I} and [Aaa03] with {\bf II} and get them in the order of existence in the bibliography.)

• Welcome to TeX - LaTeX! Can you post a MWE as in the linked question, but with the changes you have tried so far. – Andrew Swann Jan 24 '17 at 12:59
• In the given answer MWE I have set style=phys and tried to define new bibenvironment as follows % \defbibenvironment{mypubs} % environment for own publications with Roman numerals {\enumerate[label={\Roman*}] {} {\setlength{\labelwidth}{\labelnumberwidth}% \setlength{\leftmargin}{\labelwidth}% \setlength{\labelsep}{\biblabelsep}% \addtolength{\leftmargin}{\labelsep}% \setlength{\itemsep}{\bibitemsep}% \setlength{\parsep}{\bibparsep}}% \renewcommand*{\makelabel}[1]{\mkbibbold{\hss##1}}} {\endenumerate} {\item} – mataku24 Jan 24 '17 at 13:45
• Sorry, I don't get the environment definition copied right, but just % environment... is real comment other %'s just end lines. – mataku24 Jan 24 '17 at 13:56

This is actually quite a bit easier than Biblatex: Two bibliographies with different styles and sortings That is because we only want to mix numeric styles and we don't need to change the sorting.

\documentclass{article}

\usepackage{filecontents}

\begin{filecontents}{biblatextest1.bib}
@BOOK{BookA03,
author    = {Author Aaa},
title     = {Some Title},
publisher = {Some Publisher},
year      = 2003,
}
@BOOK{BookB02,
author    = {Author Bbb},
title     = {Some Title},
publisher = {Some Publisher},
year      = 2002,
}
\end{filecontents}

\begin{filecontents}{biblatextest2.bib}
author  = {Author Ccc},
title   = {Some Title},
year    = 2004,
url     = {www.test1.com/bild.jpg},
}
author  = {Author Ddd},
title   = {Some Title},
year    = 2001,
url     = {www.test2.com/bild.jpg},
}
\end{filecontents}

\usepackage[style = phys, defernumbers = true,  backend = biber]{biblatex}

\usepackage{hyperref}

%Append keywords to identify different bibliography entries.
\DeclareSourcemap{
\maps[datatype=bibtex, overwrite]{
\map{
\perdatasource{biblatextest1.bib}
\step[fieldset=KEYWORDS, fieldvalue=primary, append]
}
\map{
\perdatasource{biblatextest2.bib}
\step[fieldset=KEYWORDS, fieldvalue=secondary, append]
}
}
}

\DeclareFieldFormat{labelnumber}{\ifkeyword{secondary}{#1}{\mkbibbold{\RN{#1}}}}

\begin{document}

The first two citations \cite{LinkD01} and \cite{BookB02}.
The others are \cite{LinkC04} and \cite{BookA03}.

\printbibliography[title=Bibliography, keyword=primary]
\printbibliography[title=References, keyword=secondary, resetnumbers]
\end{document}


There are more elegant ways to split bibliographies if you do not already have them in different .bib files. But that depends on your setup.