@article{PMFA_1998_43_1_a4,
     author = {Peregrin, Jaroslav},
     title = {Co je to element\'arn{\'\i} logika?},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {45--47},
     year = {1998},
     volume = {43},
     number = {1},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1998_43_1_a4/}
}