# Change bibliography starting number for document class apsrev

I am currently using \begin{thebibliography} for my references at the end of a scientific paper. The numbers of the citations go from [1] to [10], as usual.

I would like to change this. I would like that the starting number were [11] to [20] for the citations. (For me, such situations frequently arise when I want to split a single latex-document into 'main text' and separate 'Supplemental Material', where the 'Supplemental Material' should have its own bibliography of additional references.)

This question has been asked for document class 'article' Change bibliography starting number, but the solution proposed there does not work for document class 'apsrev'.

I suspect the reason is the name of the internal counter. I tried - @listctr - enumiv, both did not work.

Here is what I got. Using

    \begin{thebibliography}{42}
\setcounter{enumiv}{11}


simply has no effect: references are still numbered [1]-[10]. Nothing suspicious in the log-file.

Using

    \begin{thebibliography}{42}
\makeatletter
\makeatother


gives an error message

    ! Undefined control sequence.
<argument> c@\@listctr

The control sequence at the end of the top line
of your error message was never \def'ed. If you have
misspelled it (e.g., \hobx'), type I' and the correct
spelling (e.g., I\hbox'). Otherwise just continue,
and I'll forget about whatever was undefined.

! Undefined control sequence.
...rrmessage  LaTeX Error: No counter '\@listctr
' defined.
See the LaTeX ...


Does anybody know the name of the counter in \thebibliography for 'apsrev' documents?

[A quick-fix would also be fine, even if it involves manual steps, since this is already the final ready-to-print version.]

• You wrote, "I tried - @listctr - enumiv, both did not work." Please tell us in more exacting detail what precisely you tried -- and what "did not work" entails: A warning message, an error message? If so, what does the message say? – Mico Mar 3 '20 at 22:12
• Thanks, Mico, you are right: I added information. – bmf Mar 4 '20 at 11:06

I found the answer: My document class 'revtex' was derived from 'natbib'.

The solution for 'natbib' was previously described here: How to set the number of the first citation?

I quote from that solution

\usepackage[numbers]{natbib}

\usepackage{etoolbox}

\makeatletter
\apptocmd{\thebibliography}{\global\c@NAT@ctr 15\relax}{}{}
\makeatother
`