Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2023_11_a13, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {49--50}, publisher = {mathdoc}, number = {11}, year = {2023}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2023_11_a13/} }
Задачи. Kvant, no. 11 (2023), pp. 49-50. http://geodesic.mathdoc.fr/item/KVANT_2023_11_a13/