Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2009_3_a7, author = {A. Akopyan}, title = {{\CYRO} {\cyrl}{\cyre}{\cyrm}{\cyrn}{\cyri}{\cyrs}{\cyrk}{\cyra}{\cyrt}{\cyre} {{\CYRB}{\cyre}{\cyrr}{\cyrn}{\cyru}{\cyrl}{\cyrl}{\cyri}}}, journal = {Kvant}, pages = {42--44}, publisher = {mathdoc}, number = {3}, year = {2009}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2009_3_a7/} }
A. Akopyan. О лемнискате Бернулли. Kvant, no. 3 (2009), pp. 42-44. http://geodesic.mathdoc.fr/item/KVANT_2009_3_a7/