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@article{DAN_1961_140_1_a14, author = {A. K. Rybnikov}, title = {Symmetric spaces of affine connection of {class~I}}, journal = {Doklady Akademii Nauk}, pages = {59--61}, publisher = {mathdoc}, volume = {140}, number = {1}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_1_a14/} }
A. K. Rybnikov. Symmetric spaces of affine connection of class~I. Doklady Akademii Nauk, Tome 140 (1961) no. 1, pp. 59-61. http://geodesic.mathdoc.fr/item/DAN_1961_140_1_a14/