@article{SM_1973_19_1_a8,
     author = {A. K. Guts},
     title = {On mappings of families of~oricycles in {Lobachevskii} space},
     journal = {Sbornik. Mathematics},
     pages = {131--138},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_19_1_a8/}
}