Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2007_5_a19, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {58}, publisher = {mathdoc}, number = {5}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2007_5_a19/} }
Задачи. Kvant, no. 5 (2007). http://geodesic.mathdoc.fr/item/KVANT_2007_5_a19/