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@article{IVM_1968_3_a3, author = {A. L. Verner and T. V. Ivanova}, title = {The area of irregular surfaces in spaces of constant curvature}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {20--27}, publisher = {mathdoc}, number = {3}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1968_3_a3/} }
A. L. Verner; T. V. Ivanova. The area of irregular surfaces in spaces of constant curvature. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1968), pp. 20-27. http://geodesic.mathdoc.fr/item/IVM_1968_3_a3/