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@article{INTA_1965_a1, author = {V. V. Ryzhkov}, title = {Differential geometry of point transformations between spaces}, journal = {Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya }, pages = {65--107}, publisher = {mathdoc}, year = {1965}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/INTA_1965_a1/} }
V. V. Ryzhkov. Differential geometry of point transformations between spaces. Itogi Nauki i Tekhniki. Seriya Algebra. Geometriya. Topologiya (1965), pp. 65-107. http://geodesic.mathdoc.fr/item/INTA_1965_a1/