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@article{ARM_1977__13_3_a1, author = {Chajda, Ivan}, title = {Weak homomorphisms of systems of equations}, journal = {Archivum mathematicum}, pages = {135--140}, publisher = {mathdoc}, volume = {13}, number = {3}, year = {1977}, mrnumber = {0460215}, zbl = {0375.08004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1977__13_3_a1/} }
Chajda, Ivan. Weak homomorphisms of systems of equations. Archivum mathematicum, Tome 13 (1977) no. 3, pp. 135-140. http://geodesic.mathdoc.fr/item/ARM_1977__13_3_a1/