@article{CMUC_1976_17_4_a2,
     author = {\v{C}uda, Karel},
     title = {A nonstandard set theory},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {647--663},
     year = {1976},
     volume = {17},
     number = {4},
     mrnumber = {0441731},
     zbl = {0352.02042},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976_17_4_a2/}
}