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Can one “manually override” Bibtex's choice of citation keys by adding a field to the entry?
I am using BiBTeX and would like to achieve the following: I am usually using a derivative of the alpha style, but for some entries I would like to define my own (preferred key). For example, I would like to reference EGAI as [EGAI] rather than [Gro60]. (If you don't know what EGA is, does not matter. The point is, that it is a book universally known in algebraic geometry as "EGA"). I tried various tricks such as defining the entry "key" without success. Perhaps complicating the question the fact that I would like to keep the rest of the keys as in alpha. An alternative solution I am willing to consider is a style where the original biblio entry would have to define the key to be used for everything, although this would be a last resort. Thanks for any help!

biblatexit’s a very powerful bibliography package. – Tobi Oct 15 '11 at 23:31