Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2008_1_a7, author = {V. \`Epshtein}, title = {{\CYRT}{\cyre}{\cyrm}{\cyra} {\cyrs} {\cyrv}{\cyra}{\cyrr}{\cyri}{\cyra}{\cyrc}{\cyri}{\cyrya}{\cyrm}{\cyri}}, journal = {Kvant}, pages = {34--35}, publisher = {mathdoc}, number = {1}, year = {2008}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2008_1_a7/} }
V. Èpshtein. Тема с вариациями. Kvant, no. 1 (2008), pp. 34-35. http://geodesic.mathdoc.fr/item/KVANT_2008_1_a7/