Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2021_1_a6, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {38}, publisher = {mathdoc}, number = {1}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2021_1_a6/} }
Задачи. Kvant, no. 1 (2021). http://geodesic.mathdoc.fr/item/KVANT_2021_1_a6/