Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1985_37_4_a4, author = {V. M. Tsvetkov}, title = {PRO-p-groups with a single defining relation}, journal = {Matemati\v{c}eskie zametki}, pages = {491--496}, publisher = {mathdoc}, volume = {37}, number = {4}, year = {1985}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1985_37_4_a4/} }
V. M. Tsvetkov. PRO-p-groups with a single defining relation. Matematičeskie zametki, Tome 37 (1985) no. 4, pp. 491-496. http://geodesic.mathdoc.fr/item/MZM_1985_37_4_a4/