Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2021_7_a9, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {{\CYRM}2658{\textendash}{\CYRM}2661,} {{\CYRF}2665{\textendash}{\CYRF}2668}}, journal = {Kvant}, pages = {19--20}, publisher = {mathdoc}, number = {7}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2021_7_a9/} }
Задачи М2658–М2661, Ф2665–Ф2668. Kvant, no. 7 (2021), pp. 19-20. http://geodesic.mathdoc.fr/item/KVANT_2021_7_a9/