@article{IVM_2008_6_a5,
     author = {M. T. Terekhin},
     title = {Small periodic solutions of nonlinear systems of differential equations with constant deviation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {56--65},
     publisher = {mathdoc},
     number = {6},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2008_6_a5/}
}