Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2011_5_a21, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {79}, publisher = {mathdoc}, number = {5}, year = {2011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2011_5_a21/} }
Задачи. Kvant, no. 5 (2011). http://geodesic.mathdoc.fr/item/KVANT_2011_5_a21/