Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2021_2_a7, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {{\CYRM}2638{\textendash}{\CYRM}2641,} {{\CYRF}2645{\textendash}{\CYRF}2648}}, journal = {Kvant}, pages = {18--19}, publisher = {mathdoc}, number = {2}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2021_2_a7/} }
Задачи М2638–М2641, Ф2645–Ф2648. Kvant, no. 2 (2021), pp. 18-19. http://geodesic.mathdoc.fr/item/KVANT_2021_2_a7/