Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2007_6_a5, author = {V. Alekseev and A. Zhukov}, title = {{\guillemotleft}{\CYRN}{\cyre}{\cyrv}{\cyro}{\cyrz}{\cyrm}{\cyro}{\cyrzh}{\cyrn}{\cyrery}{\cyre}{\guillemotright} {\cyrf}{\cyri}{\cyrg}{\cyru}{\cyrr}{\cyrery}}, journal = {Kvant}, pages = {32--33}, publisher = {mathdoc}, number = {6}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2007_6_a5/} }
V. Alekseev; A. Zhukov. «Невозможные» фигуры. Kvant, no. 6 (2007), pp. 32-33. http://geodesic.mathdoc.fr/item/KVANT_2007_6_a5/