Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2019_9_a5, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {22}, publisher = {mathdoc}, number = {9}, year = {2019}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2019_9_a5/} }
Задачи. Kvant, no. 9 (2019). http://geodesic.mathdoc.fr/item/KVANT_2019_9_a5/