Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2020_8_a14, title = {{\CYRK}{\cyra}{\cyrl}{\cyre}{\cyrishrt}{\cyrd}{\cyro}{\cyrs}{\cyrk}{\cyro}{\cyrp} {{\guillemotleft}{\CYRK}{\cyrv}{\cyra}{\cyrn}{\cyrt}{\cyra}{\guillemotright}.} {{\CYRV}{\cyro}{\cyrp}{\cyrr}{\cyro}{\cyrs}{\cyrery}} {\cyri} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri}}, journal = {Kvant}, pages = {59--61}, publisher = {mathdoc}, number = {8}, year = {2020}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2020_8_a14/} }
Калейдоскоп «Кванта». Вопросы и задачи. Kvant, no. 8 (2020), pp. 59-61. http://geodesic.mathdoc.fr/item/KVANT_2020_8_a14/