I'm new to latex and I'm using Overleaf. I encountered a warning during the introduction of my first citation. I failed to find a solution to my problem by reading tutorials and forums, although I found topics about the exact same problem.

Packages I use in my pre.tex file


reference in question in my bibliography.bib file :

@book{aglarov02,    address = {Makhachkala},    edition = {Yupiter},    title = {Andijcy: {Istoriko}-{etnografičeskoe} issledovanie [{Les} {Andi}: {étude} historico-ethnographique]},  shorttitle = {Les {Andis}},     author = {Aglarov, M. A.},  pages = {3},
    date = {2002}

Text in my main file:

les Andis ont été recensés comme Avars entre 1959 en 1989 (\cite[p. 3]{aglarov02}).

Warning content :

LaTeX Warning: Citation 'aglarov02' on page 3 undefined on input line

Thanks in advance for your time and effort,


  • Thank you ! How do I run biber ? – Neige May 21 '17 at 21:33
  • 1
    @TeXnician OverLeaf does it automatically. – cfr May 21 '17 at 23:03

I finally solved this problem by replacing


...by the exact same text !

  • 2
    My suspicion, based on some experience of this, is that you just didn't wait long enough between edits for OverLeaf to complete all the required steps. – cfr May 21 '17 at 23:04

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