@article{120134, author = {Franti\v sek Krutsk\'y}, title = {Homomorphic correspondences of relational systems}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {22}, year = {1983}, pages = {37-46}, zbl = {0589.20050}, mrnumber = {744698}, language = {en}, url = {http://dml.mathdoc.fr/item/120134} }
Krutský, František. Homomorphic correspondences of relational systems. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 22 (1983) pp. 37-46. http://gdmltest.u-ga.fr/item/120134/
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