[1] K. R. Fuller F. W. Anderson:
Rings and Categories of Modules. New York - Heidelberg - Berlin, Springer-Verlag, 1974.
MR 0417223
[2] C. Faith:
Algebra: Rings, Modules and Categories. I. and II., New York - Heidelberg - Berlin, Springer-Verlag, 1973.
MR 0366960 |
Zbl 0266.16001
[3] S. U. Chase:
Direct products of modules. Trans. Amer. Math. Soc., 97, 1960, 457-473.
MR 0120260