TY  - JOUR
AU  - S. V. Zharov
TI  - Geometric ideas of N.~Lobachevsky (for his 225-th anniversary)
JO  - Matematičeskoe obrazovanie
PY  - 2017
SP  - 48
EP  - 51
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MO_2017_81_1_a6/
LA  - ru
ID  - MO_2017_81_1_a6
ER  -