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@article{MM2_1989__65_3_155430, author = {Hans Michael Uns\"old}, title = {A4n-polyhedra with free homology.}, journal = {Manuscripta mathematica}, pages = {123--146}, publisher = {mathdoc}, volume = {65}, number = {3}, year = {1989}, zbl = {0683.55002}, url = {http://geodesic.mathdoc.fr/item/MM2_1989__65_3_155430/} }
Hans Michael Unsöld. A4n-polyhedra with free homology.. Manuscripta mathematica, Tome 65 (1989) no. 3, pp. 123-146. http://geodesic.mathdoc.fr/item/MM2_1989__65_3_155430/