@article{MASLO_1988_38_3_a6,
     author = {Chajda, Ivan},
     title = {The egg-box property of congruences},
     journal = {Mathematica slovaca},
     pages = {243--247},
     year = {1988},
     volume = {38},
     number = {3},
     mrnumber = {977902},
     zbl = {0649.08002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1988_38_3_a6/}
}