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@article{DAN_1961_140_4_a7, author = {P. I. Petrov}, title = {The fundamental problem of {non-Riemannian} geometry in a binary region}, journal = {Doklady Akademii Nauk}, pages = {766--768}, publisher = {mathdoc}, volume = {140}, number = {4}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_4_a7/} }
P. I. Petrov. The fundamental problem of non-Riemannian geometry in a binary region. Doklady Akademii Nauk, Tome 140 (1961) no. 4, pp. 766-768. http://geodesic.mathdoc.fr/item/DAN_1961_140_4_a7/