@article{CMUC_1985__26_4_a9,
     author = {Tzouvaras, Athanossios},
     title = {Minimal ultrafilters and maximal endomorphic universes},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {719--726},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1985},
     mrnumber = {831807},
     zbl = {0587.03040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1985__26_4_a9/}
}