@article{120313, author = {Radom\'\i r Hala\v s}, title = {A note on homotopy in universal algebra}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {33}, year = {1994}, pages = {39-42}, zbl = {0844.08008}, mrnumber = {1385744}, language = {en}, url = {http://dml.mathdoc.fr/item/120313} }
Halaš, Radomír. A note on homotopy in universal algebra. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 33 (1994) pp. 39-42. http://gdmltest.u-ga.fr/item/120313/
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