@article{DAN_1958_122_2_a5,
     author = {A. V. Pogorelov},
     title = {On the regularity of convex surfaces with a regular metric in spaces of constant curvature},
     journal = {Doklady Akademii Nauk},
     pages = {186--187},
     publisher = {mathdoc},
     volume = {122},
     number = {2},
     year = {1958},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_122_2_a5/}
}