I'm working on a new edition of a book which uses a very unusual style of bibliography: Entries are sorted in author-year fashion, but then numbered per author or group of authors, e.g.:
Milnor, J.: 1. Construction of universal bundles: I, Ann. Math., (2)63:272-284 (1956). 2. Construction of universal bundles: II, Ann. Math., (2)63: 430-436 (1956). 3. On manifolds homeomorphic to the 7-sphere, Ann. Math., (2)64: 399-405 (1956). 4. The theory of characteristic classes, mimeographed, Princeton University, Princeton, N.J., 1957. Milnor, J., and M. A. Kervaire: 1. Bernoulli numbers, homotopy groups, and a theorem of Rohlin, Proc. Intern. Congr. Math., 1958. Milnor, J., and E. Spanier: 1. Two remarks on fibre homotopy type, Pacific J. Math., 10: 585-590 (1960).
Citations are formatted as Milnor , and so on.
Is there any bibtex style for something strange as this? Or can this type of bibliography be created with biblatex without too much coding?