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@article{IVM_1964_4_a2, author = {L. Ya. Berezina}, title = {On the theory of the two-dimensional surface in $E_{4}$}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {12--18}, publisher = {mathdoc}, number = {4}, year = {1964}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1964_4_a2/} }
L. Ya. Berezina. On the theory of the two-dimensional surface in $E_{4}$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (1964), pp. 12-18. http://geodesic.mathdoc.fr/item/IVM_1964_4_a2/