TY  - GEN
AU  - Poenaru,Valentin
TI  - Groupes discrets
T2  - Lecture notes in mathematics ; 421
SN  - 0387069674
U1  - 512.55 
PY  - 1974///
CY  - Berlin, New York
PB  - Springer-Verlag
KW  - Discrete groups
KW  - Algebraic topology
N1  - Contine bibliogr. si index
ER  -