@article{PMFA_1965_10_1_a4,
     author = {Petr\r{u}, Franti\v{s}ek},
     title = {Plynov\'e lasery},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {51--62},
     year = {1965},
     volume = {10},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1965_10_1_a4/}
}