Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1968_4_4_a2, author = {Yu. M. Ryabukhin}, title = {A countable simple quasiregular ring}, journal = {Matemati\v{c}eskie zametki}, pages = {399--403}, publisher = {mathdoc}, volume = {4}, number = {4}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_4_a2/} }
Yu. M. Ryabukhin. A countable simple quasiregular ring. Matematičeskie zametki, Tome 4 (1968) no. 4, pp. 399-403. http://geodesic.mathdoc.fr/item/MZM_1968_4_4_a2/