@article{AUPO_1995__34_1_a6,
     author = {Chajda, Ivan},
     title = {Varieties having the congruence extension property},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {63--68},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1995},
     mrnumber = {1447255},
     zbl = {0861.08006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1995__34_1_a6/}
}