@article{CMUC_1998__39_2_a0,
     author = {Beran, Ladislav},
     title = {Some types of implicative ideals},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {219--225},
     publisher = {mathdoc},
     volume = {39},
     number = {2},
     year = {1998},
     mrnumber = {1651930},
     zbl = {0938.06004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1998__39_2_a0/}
}