Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2011_2_a13, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {{\CYRM}2214{\textendash}{\CYRM}2220,} {{\CYRF}2220{\textendash}{\CYRF}2227}}, journal = {Kvant}, pages = {27--28}, publisher = {mathdoc}, number = {2}, year = {2011}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2011_2_a13/} }
Задачи М2214–М2220, Ф2220–Ф2227. Kvant, no. 2 (2011), pp. 27-28. http://geodesic.mathdoc.fr/item/KVANT_2011_2_a13/