Voir la notice de l'article provenant de la source Math-Net.Ru
@article{IVM_1996_9_a1, author = {A. B. Verevkin}, title = {A condition for graded freeness}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {14--15}, publisher = {mathdoc}, number = {9}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_1996_9_a1/} }
A. B. Verevkin. A condition for graded freeness. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 9 (1996), pp. 14-15. http://geodesic.mathdoc.fr/item/IVM_1996_9_a1/