Some publishers' system only compiles submitted
.tex files in a single
latex run, without running
bibtex — hence the instruction to authors who used BibTeX during manuscript preparation to paste the contents of the
.bbl file input into the
.tex for submission. Here’s how you can do this on Overleaf:
.zipfile has completed downloading, unzip it. You should find the .bbl file in there.
.bblfile with a plain text editor, and copy everything in this file.
.texfile on Overleaf, comment out the line
\bibliography. And in its place, paste the contents of the
.bblfile that was copied just now.
The project is now ready to be submitted to the journal, complying with their requirement that the contents of the
.bbl file are pasted in the
.tex manuscript as one single file.