@article{ND_2010_6_4_a11, author = {A. V. Borisov and I. S. Mamaev}, title = {{\CYRO}{\cyrt}{\cyrv}{\cyre}{\cyrt} {\cyrn}{\cyra}~{\cyrz}{\cyra}{\cyrm}{\cyre}{\cyrch}{\cyra}{\cyrn}{\cyri}{\cyrya} {{\CYRA}.\,{\CYRT}.~{\CYRF}{\cyro}{\cyrm}{\cyre}{\cyrn}{\cyrk}{\cyro}}}, journal = {Russian journal of nonlinear dynamics}, pages = {893--895}, publisher = {mathdoc}, volume = {6}, number = {4}, year = {2010}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/ND_2010_6_4_a11/} }