Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1962_1_4_a2, author = {Yu. L. Ershov}, title = {On a conjecture of {V.} {A.} {Uspenski\u{\i}}}, journal = {Algebra i logika}, pages = {45--48}, publisher = {mathdoc}, volume = {1}, number = {4}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1962_1_4_a2/} }
Yu. L. Ershov. On a conjecture of V. A. Uspenski\u{\i}. Algebra i logika, Tome 1 (1962) no. 4, pp. 45-48. http://geodesic.mathdoc.fr/item/AL_1962_1_4_a2/