@article{100038, author = {Eduard \v Cech}, title = {Proektivnaia differentsial'naia geometriia sootvetstvii mezhdu dvumia prostranstvami. I}, journal = {Czechoslovak Mathematical Journal}, volume = {02}, year = {1952}, pages = {91-107}, zbl = {0052.38504}, mrnumber = {0063100}, language = {ru}, url = {http://dml.mathdoc.fr/item/100038} }
Čech, Eduard. Проективная дифференциальная геометрия соответствий между двумя пространствами. I. Czechoslovak Mathematical Journal, Tome 02 (1952) pp. 91-107. http://gdmltest.u-ga.fr/item/100038/