@article{DAN_1961_137_1_a7,
     author = {A. V. Pogorelov},
     title = {Regular convex surfaces with a regular metric in {Lobachevsky} space},
     journal = {Doklady Akademii Nauk},
     pages = {35--38},
     publisher = {mathdoc},
     volume = {137},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_1_a7/}
}