1. Homological Algebra;Cartan,1956
2. Torsionless modules;Kato;Tôhoku Math. J.,1968
3. Rings of dominant dimension ⩾ 1;Kato,1968
4. Rings of U-dominant dimension ⩾ 1;Kato;Tôhoku Math. J.,1969
5. Duality for modules and its applications to the theory of rings with minimum condition;Morita;Sci. Rep. Tokyo Kyoiku Daigaku, Sect. A,1958