@article{DE_1972_8_7_a3,
     author = {G. M. Erahtina},
     title = {Certain properties of trajectories on a surface of genus two},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1176--1186},
     year = {1972},
     volume = {8},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1972_8_7_a3/}
}