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@article{IVM_1963_5_a10, author = {G. N. Makeev}, title = {Adjunction of a focal pair $T,\,\theta$ to a given original congruence}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {63--70}, publisher = {mathdoc}, number = {5}, year = {1963}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1963_5_a10/} }
G. N. Makeev. Adjunction of a focal pair $T,\,\theta$ to a given original congruence. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 5 (1963), pp. 63-70. http://geodesic.mathdoc.fr/item/IVM_1963_5_a10/