Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2012_3_a6, author = {V. Drozdov}, title = {{\CYRK}{\cyro}{\cyrg}{\cyrd}{\cyra} {\cyro}{\cyrr}{\cyrb}{\cyri}{\cyrt}{\cyra} -- {\cyrerev}{\cyrl}{\cyrl}{\cyri}{\cyrp}{\cyrs}}, journal = {Kvant}, pages = {35--38}, publisher = {mathdoc}, number = {3}, year = {2012}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2012_3_a6/} }
V. Drozdov. Когда орбита -- эллипс. Kvant, no. 3 (2012), pp. 35-38. http://geodesic.mathdoc.fr/item/KVANT_2012_3_a6/