Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2005_2_a25, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {57--58}, publisher = {mathdoc}, number = {2}, year = {2005}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2005_2_a25/} }
Задачи. Kvant, no. 2 (2005), pp. 57-58. http://geodesic.mathdoc.fr/item/KVANT_2005_2_a25/