Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2009_4_a15, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {{\CYRM}2139{\textendash}{\CYRM}2145,} {{\CYRF}2145{\textendash}{\CYRF}2152}}, journal = {Kvant}, pages = {20--21}, publisher = {mathdoc}, number = {4}, year = {2009}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2009_4_a15/} }
Задачи М2139–М2145, Ф2145–Ф2152. Kvant, no. 4 (2009), pp. 20-21. http://geodesic.mathdoc.fr/item/KVANT_2009_4_a15/