@article{DAN_1973_213_4_a1,
     author = {V. K. Bel'nov},
     title = {On a property of the torus},
     journal = {Doklady Akademii Nauk},
     pages = {764--765},
     publisher = {mathdoc},
     volume = {213},
     number = {4},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_4_a1/}
}