@article{IVM_2007_2_a5,
     author = {I. A. Rudakov},
     title = {Periodic solutions of a nonlinear wave equation with {Neumann} and {Dirichlet} boundary conditions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {46--55},
     publisher = {mathdoc},
     number = {2},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2007_2_a5/}
}