Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2015_4_a4, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {23}, publisher = {mathdoc}, number = {4}, year = {2015}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2015_4_a4/} }
Задачи. Kvant, no. 4 (2015). http://geodesic.mathdoc.fr/item/KVANT_2015_4_a4/