TY  - BOOK
AU  - Tachikawa, Hiroyuki
AU  - Ringel, Claus Michael; notes by -
TI  - Quasi-frobeniue rings and generalizations; QF-3 and QF-1 rings
T2  - Lecture notes in Mathematics
U1  - 512 
PY  - 1973///
CY  - Berlin
PB  - Springer-Verlag
N1  - "Notes by Claus Michael Ringel"
ER  -