1. The Collected Papers of Emil Artin;Artin,1965
2. Seminar on Algebraic Groups and Related Finite Groups;Borel,1970
3. Homological Algebra;Cartan,1956
4. The cohomology of group extensions;Charlap;Trans. Amer. Math. Soc.,1966
5. Characteristic classes for modules over groups, I;Charlap;Trans. Amer. Math. Soc.,1969