@article{CMUC_1984_25_1_a4,
     author = {Marek, Ivo and \v{Z}itn\'y, Karel},
     title = {Equivalence of $K$-irreducibility concepts},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {61--72},
     year = {1984},
     volume = {25},
     number = {1},
     mrnumber = {749116},
     zbl = {0558.47031},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1984_25_1_a4/}
}