@article{PMFA_1989_34_3_a1,
     author = {Smullyan, Raymond M.},
     title = {Epistemologick\'a no\v{c}n{\'\i} m\r{u}ra},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {143--151},
     year = {1989},
     volume = {34},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1989_34_3_a1/}
}