Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2021_2_a4, author = {E. Sokolov}, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {31}, publisher = {mathdoc}, number = {2}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2021_2_a4/} }
E. Sokolov. Задачи. Kvant, no. 2 (2021). http://geodesic.mathdoc.fr/item/KVANT_2021_2_a4/