@article{PMFA_1956_1_5-6_a11,
     author = {Kugu\v{s}ev, A. M.},
     title = {Ultrakr\'atk\'e vlny},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {610--630},
     year = {1956},
     volume = {1},
     number = {5-6},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1956_1_5-6_a11/}
}