Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1961_3_a7, author = {M. B. Pergamenshchikov}, title = {Pair of $H$-congruences}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {91--98}, publisher = {mathdoc}, number = {3}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1961_3_a7/} }
M. B. Pergamenshchikov. Pair of $H$-congruences. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 3 (1961), pp. 91-98. http://geodesic.mathdoc.fr/item/IVM_1961_3_a7/