I use BibLaTeX together with Biber and the standard alphabetic style.
If a bibliography entry contains more than a specific number of authors (default = 3), BibLaTeX only prints the first author followed by "et al.". This affects the bibliography itself but also certain citation commands like
\citeauthors, etc. Normally, BibLaTex sorts the list of authors alphabetically.
Is there a way to denote a "special" author (i.e. like the primary author of a work) on a per entry level which should be used together with "et al." instead of the alphabetically first one?
However, if the complete list of authors is printed, then the alphabetical order should be preserved.