@article{AUPO_1973__13_1_a7,
     author = {Pal\'at, Jind\v{r}ich},
     title = {\"Uber die {Menge} erster {Integrale} gewisser partieller {Differetialgleichungen} erster {Ordnung}},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {71--81},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {1973},
     mrnumber = {0481393},
     zbl = {0293.35019},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1973__13_1_a7/}
}