@article{PMFA_1956_1_5-6_a17,
     author = {Havel, V\'aclav},
     title = {N\v{e}kolik pozn\'amek k theorii prom{\'\i}t\'an{\'\i}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {692--694},
     year = {1956},
     volume = {1},
     number = {5-6},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956_1_5-6_a17/}
}