@article{AUPO_1968_9_1_a4,
     author = {Vor\'a\v{c}ek, Jan},
     title = {Pozn\'amka o jist\'ych neline\'arn{\'\i}ch diferenci\'aln{\'\i}ch rovnic{\'\i}ch 3. a 4. \v{r}\'adu},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {93--101},
     year = {1968},
     volume = {9},
     number = {1},
     mrnumber = {0310362},
     zbl = {0183.36503},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1968_9_1_a4/}
}