@article{PMFA_1983_28_6_a1,
     author = {Zajac, Rudolf},
     title = {Max {Planck} a vznik modernej fyziky},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {311--319},
     year = {1983},
     volume = {28},
     number = {6},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1983_28_6_a1/}
}