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@article{JRAM_1987__377_152933, author = {J. Bochnak and W. Kucharz}, title = {Realization of homotopy classes by algebraic mappings.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {159--169}, publisher = {mathdoc}, volume = {377}, year = {1987}, zbl = {0619.14014}, url = {http://geodesic.mathdoc.fr/item/JRAM_1987__377_152933/} }
J. Bochnak; W. Kucharz. Realization of homotopy classes by algebraic mappings.. Journal für die reine und angewandte Mathematik, Tome 377 (1987), pp. 159-169. http://geodesic.mathdoc.fr/item/JRAM_1987__377_152933/