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@article{IVM_1978_5_a15, author = {F. S. Akhrarov}, title = {Analytic surfaces of constant curvature for a~space of nondegenerate null-pairs}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {127--130}, publisher = {mathdoc}, number = {5}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1978_5_a15/} }
F. S. Akhrarov. Analytic surfaces of constant curvature for a~space of nondegenerate null-pairs. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1978), pp. 127-130. http://geodesic.mathdoc.fr/item/IVM_1978_5_a15/