TY  - BOOK
AU  - Fossum, Robert M.
ED  - Griffith, Phillip A.
ED  - Reiten, Idun
TI  - Trivial extensions of abelian categories : homological algebra of trivial extensions of abelian categories with application to ring theory
T2  - Lecture notes in mathematics 456
U1  - 512.55 
PY  - 1975///
CY  - Berlin
PB  - Springer-Verlag
ER  -