@article{PMFA_1975__20_6_a3,
     author = {Pu\v{s}\v{c}arovskij, D. J.},
     title = {Tajemstv{\'\i} krystal\r{u}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {320--331},
     publisher = {mathdoc},
     volume = {20},
     number = {6},
     year = {1975},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1975__20_6_a3/}
}