@article{DMGAA_2001_21_1_a9,
     author = {Chajda, Ivan and Eigenthaler, G\"unther},
     title = {Balanced congruences},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {105--114},
     year = {2001},
     volume = {21},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2001_21_1_a9/}
}