## LaTeX forum ⇒ BibTeX, biblatex and biber ⇒ warning: citation undefined

Information and discussion about BiBTeX - the bibliography tool for LaTeX documents.
emtimmers
Posts: 4
Joined: Thu Nov 29, 2018 3:23 pm

### warning: citation undefined

Dear all,
My citations are not recognized anymore when I compile my .tex file. My bibliography file is called encapsulation.bib and I'm referring to my bibliography using:
\bibliography{encapsulation}
In the main text I cite using (for example for a reference called "li") :
\cite{li}
What could be going wrong?

Stefan Kottwitz
Posts: 9398
Joined: Mon Mar 10, 2008 9:44 pm
Perhaps you have to run bibtex (or biber) again on the document, and then compile the .tex again.

Stefan

emtimmers
Posts: 4
Joined: Thu Nov 29, 2018 3:23 pm
Stefan Kottwitz wrote:Perhaps you have to run bibtex (or biber) again on the document, and then compile the .tex again.

Stefan

What do you mean by 'run bibtex again'? I'm compiling my .tex file in Overleaf, with the corresponding .bib file in the same folder.

emtimmers
Posts: 4
Joined: Thu Nov 29, 2018 3:23 pm
This issue has not been resolved, can somebody help me please? Thanks in advance!

Johannes_B
Site Moderator
Posts: 4035
Joined: Thu Nov 01, 2012 4:08 pm
Are there any errors or warnings reported from Overleaf?
The smart way: Calm down and take a deep breath, read posts and provided links attentively, try to understand and ask if necessary.