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@article{DAN_1973_208_6_a17, author = {R. F. Polishchuk}, title = {Isometries of {Pfaff's} space -- time systems}, journal = {Doklady Akademii Nauk}, pages = {1321--1324}, publisher = {mathdoc}, volume = {208}, number = {6}, year = {1973}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a17/} }
R. F. Polishchuk. Isometries of Pfaff's space -- time systems. Doklady Akademii Nauk, Tome 208 (1973) no. 6, pp. 1321-1324. http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a17/