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@article{MZ_1980__173_172976, author = {Johannes Huebschmann}, title = {The {Homotype} {Type} of a {Combinatorially} {Aspherical} {Presentation.}}, journal = {Mathematische Zeitschrift}, pages = {163--170}, publisher = {mathdoc}, volume = {173}, year = {1980}, zbl = {0421.55004}, url = {http://geodesic.mathdoc.fr/item/MZ_1980__173_172976/} }
Johannes Huebschmann. The Homotype Type of a Combinatorially Aspherical Presentation.. Mathematische Zeitschrift, Tome 173 (1980), pp. 163-170. http://geodesic.mathdoc.fr/item/MZ_1980__173_172976/