@article{AUPO_1983__22_1_a3,
     author = {Krutsk\'y, Franti\v{s}ek},
     title = {Homomorphic correspondences of relational systems},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {37--46},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1983},
     mrnumber = {744698},
     zbl = {0589.20050},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1983__22_1_a3/}
}