Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{MO_2007_a0, title = {{\CYRO}{\cyrt} {\cyrr}{\cyre}{\cyrd}{\cyra}{\cyrk}{\cyrc}{\cyri}{\cyri}}, journal = {Matemati\v{c}eskoe obrazovanie}, pages = {1}, publisher = {mathdoc}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MO_2007_a0/} }
От редакции. Matematičeskoe obrazovanie (2007). http://geodesic.mathdoc.fr/item/MO_2007_a0/