@misc{PMFA_1967_12_6_a3,
     title = {Fyzik\'aln{\'\i} d{\'\i}lo {Jana} {Marka} {Marci} z {Kronlandu}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {356--362},
     year = {1967},
     volume = {12},
     number = {6},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1967_12_6_a3/}
}