@article{MO_2017_81_1_a6,
     author = {S. V. Zharov},
     title = {Geometric ideas of {N.~Lobachevsky} (for his 225-th anniversary)},
     journal = {Matemati\v{c}eskoe obrazovanie},
     pages = {48--51},
     publisher = {mathdoc},
     volume = {81},
     number = {1},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MO_2017_81_1_a6/}
}