1. Auslander, L., On the dimension of modules and algebras. III, Nagoya Math. J. 9 (1955), 67 - 77.
2. Eklof, P. C., Homological dimension and stationary sets, Math. Z. 180 (1982), 1 - 9.
3. Kaplansky, I., Projective modules, Ann. of Math. 68 (1958), 372 - 377.
4. Kaplansky, I., The homological dimension of a quotient field, Nagoya Math. J. 27 (1966), 139 - 142.
5. Kaplansky, I., Fields and Rings, Univ. of Chicago Press (Chicago, 1969 ).