@article{IVM_2014_1_a2,
     author = {V. G. Il'ichev and A. A. Zelenin},
     title = {Two-party graphs and monotonicity properties of the {Poincar\'e} mapping},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {31--40},
     publisher = {mathdoc},
     number = {1},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2014_1_a2/}
}