Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2007_4_a20, author = {S. M. Lavrenov}, title = {{\CYRM}{\cyrn}{\cyro}{\cyrzh}{\cyre}{\cyrs}{\cyrt}{\cyrv}{\cyro} {\cyrz}{\cyrn}{\cyra}{\cyrch}{\cyre}{\cyrn}{\cyri}{\cyrishrt} {\cyrf}{\cyru}{\cyrn}{\cyrk}{\cyrc}{\cyri}{\cyri}}, journal = {Kvant}, pages = {42--46}, publisher = {mathdoc}, number = {4}, year = {2007}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2007_4_a20/} }
S. M. Lavrenov. Множество значений функции. Kvant, no. 4 (2007), pp. 42-46. http://geodesic.mathdoc.fr/item/KVANT_2007_4_a20/