@article{10_21136_CMJ_1961_100443,
     author = {Vejvoda, Otto},
     title = {On the periodic solution of a quasi-linear non-autonomous system},
     journal = {Czechoslovak Mathematical Journal},
     pages = {62--75},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1961},
     doi = {10.21136/CMJ.1961.100443},
     mrnumber = {0144010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100443/}
}