@article{PMFA_1998_43_2_a1,
     author = {Fischer, Jan},
     title = {Z\'aludnosti poruchov\'e teorie},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {100--103},
     year = {1998},
     volume = {43},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1998_43_2_a1/}
}