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@article{MZ_1972__126_171738, author = {Derek A. Waller}, title = {On the {Weak} {Covering} {Homotopy} {Property.}}, journal = {Mathematische Zeitschrift}, pages = {243--246}, publisher = {mathdoc}, volume = {126}, year = {1972}, zbl = {0223.55022}, url = {http://geodesic.mathdoc.fr/item/MZ_1972__126_171738/} }
Derek A. Waller. On the Weak Covering Homotopy Property.. Mathematische Zeitschrift, Tome 126 (1972), pp. 243-246. http://geodesic.mathdoc.fr/item/MZ_1972__126_171738/