@article{DAN_1978_241_2_a1,
     author = {A. G. Vainshtein and E. M. Gorelik and V. A. Efremovich},
     title = {Fibration of the {Lobacevskii} plane},
     journal = {Doklady Akademii Nauk},
     pages = {269--271},
     publisher = {mathdoc},
     volume = {241},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_241_2_a1/}
}