For a long time I have been unsuccessful at using the crossref field in BibTeX properly for the situations where I need it most: when I have multiple chapters in an book consisting of an edited collection of articles in my database, and I want to provide book-level information through a cross-reference. I always got the error
Warning--empty booktitle in <your_favorite_key_here>
which was rather frustrating.
However, I’ve finally figured out that for a book or proceedings, you need to specify both title and booktitle fields in the book entry. Most of the time the contents of these fields will be identical. Looking back at the Guide to LaTeX, this is a no-brainer, but it stumped me for a very long time. May this blog post save you similar agony!
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