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@article{DAN_1968_183_2_a3, author = {N. A. Bobylev}, title = {The construction of regular direction functions}, journal = {Doklady Akademii Nauk}, pages = {265--266}, publisher = {mathdoc}, volume = {183}, number = {2}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a3/} }
N. A. Bobylev. The construction of regular direction functions. Doklady Akademii Nauk, Tome 183 (1968) no. 2, pp. 265-266. http://geodesic.mathdoc.fr/item/DAN_1968_183_2_a3/