@article{10_21136_CMJ_1970_100974,
     author = {Krylov\'a, Nad\v{e}\v{z}da},
     title = {Periodic solutions of hyperbolic partial differential equation with quadratic dissipative term},
     journal = {Czechoslovak Mathematical Journal},
     pages = {375--405},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1970},
     doi = {10.21136/CMJ.1970.100974},
     mrnumber = {0283358},
     zbl = {0214.10402},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1970.100974/}
}