TY  - BOOK
AU  - Fossum, Robert M.
AU  - Griffith, Phillip A.
AU  - Reiten, Idun
TI  - Trivial extensions of abelian categories: : Homological algebra of trivial extensions of abelian categories with applications to ring theory 
T2  - Lecture notes in Mathematics
U1  - 512 
PY  - 1975///
CY  - Berlin
PB  - Springer-Verlag
ER  -