Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2018_3_a12, title = {{\CYRZ}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} 25--28}, journal = {Kvant}, pages = {28}, publisher = {mathdoc}, number = {3}, year = {2018}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2018_3_a12/} }
Задачи 25--28. Kvant, no. 3 (2018). http://geodesic.mathdoc.fr/item/KVANT_2018_3_a12/