@article{INTG_1974_6_a15,
     author = {D. D. Sokolov},
     title = {Two-dimensional convex surfaces with definite metric in three-dimensional pseudoeuclidean space},
     journal = {Itogi Nauki i Tekhniki. Seriya Problemy Geometrii. Trudy Geometricheskogo Seminara},
     pages = {277--293},
     year = {1974},
     volume = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTG_1974_6_a15/}
}