@article{10_21136_CMJ_1969_100915,
     author = {Kop\'a\v{c}kov\'a-Such\'a, Marie},
     title = {On the weakly nonlinear wave equation involving a small parameter at the highest derivative},
     journal = {Czechoslovak Mathematical Journal},
     pages = {469--491},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {1969},
     doi = {10.21136/CMJ.1969.100915},
     mrnumber = {0274971},
     zbl = {0181.37302},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1969.100915/}
}