@article{PMFA_1978_23_5_a7,
     author = {Kopka, Jan},
     title = {O jednom interdiscipl{\'\i}nov\'em probl\'emu},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {286--287},
     year = {1978},
     volume = {23},
     number = {5},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1978_23_5_a7/}
}