@article{02119182, title = {On a problem of Avhadiev.}, journal = {Lobachevskii Journal of Mathematics}, volume = {15}, year = {2004}, pages = {57-69}, zbl = {1064.30015}, language = {en}, url = {http://dml.mathdoc.fr/item/02119182} }
Kuznetsov, Alexander. On a problem of Avhadiev.. Lobachevskii Journal of Mathematics, Tome 15 (2004) pp. 57-69. http://gdmltest.u-ga.fr/item/02119182/