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@article{IVM_2001_3_a6, author = {L. A. Masal'tsev}, title = {Surfaces with planar lines of curvature in {Lobachevskii} space}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {39--46}, publisher = {mathdoc}, number = {3}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2001_3_a6/} }
L. A. Masal'tsev. Surfaces with planar lines of curvature in Lobachevskii space. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (2001), pp. 39-46. http://geodesic.mathdoc.fr/item/IVM_2001_3_a6/