TY  - BOOK
AU  - Fenchel, Werner,
TI  - Elementary geometry in hyperbolic space
T2  - De Gruyter studies in mathematics
SN  - 3110117347
AV  - QA685 F45
PY  - 1989///
CY  - Berlin
PB  - W. de Gruyter
KW  - Geometría hiperbólica
ER  -