Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2000_67_4_a11, author = {V. Yu. Popov}, title = {Undecidability of the word problem in relatively free rings}, journal = {Matemati\v{c}eskie zametki}, pages = {582--594}, publisher = {mathdoc}, volume = {67}, number = {4}, year = {2000}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2000_67_4_a11/} }
V. Yu. Popov. Undecidability of the word problem in relatively free rings. Matematičeskie zametki, Tome 67 (2000) no. 4, pp. 582-594. http://geodesic.mathdoc.fr/item/MZM_2000_67_4_a11/