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@article{ARM_1973__9_2_a2, author = {Chajda, Ivan}, title = {Direct products of homomorphic mappings. {I}}, journal = {Archivum mathematicum}, pages = {61--65}, publisher = {mathdoc}, volume = {09}, number = {2}, year = {1973}, mrnumber = {0344177}, zbl = {0279.08004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1973__9_2_a2/} }
Chajda, Ivan. Direct products of homomorphic mappings. I. Archivum mathematicum, Tome 09 (1973) no. 2, pp. 61-65. http://geodesic.mathdoc.fr/item/ARM_1973__9_2_a2/