TY  - JOUR
AU  - V. V. Vishnevskii
TI  - On the bicentenary of N.~I.~Lobachevskii. Lessons and results
JO  - Trudy Geometricheskogo Seminara
PY  - 1997
SP  - 23
EP  - 32
VL  - 23
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/KUTGS_1997_23_a2/
LA  - ru
ID  - KUTGS_1997_23_a2
ER  -