Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1961_138_5_a8, author = {M. B. Pergamenshchikov}, title = {Configuration of $H$~congruences}, journal = {Doklady Akademii Nauk}, pages = {1020--1021}, publisher = {mathdoc}, volume = {138}, number = {5}, year = {1961}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1961_138_5_a8/} }
M. B. Pergamenshchikov. Configuration of $H$~congruences. Doklady Akademii Nauk, Tome 138 (1961) no. 5, pp. 1020-1021. http://geodesic.mathdoc.fr/item/DAN_1961_138_5_a8/