Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2015_5_a23, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {82--83}, publisher = {mathdoc}, number = {5}, year = {2015}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2015_5_a23/} }
Задачи. Kvant, no. 5 (2015), pp. 82-83. http://geodesic.mathdoc.fr/item/KVANT_2015_5_a23/