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@article{MZ_1932__35_168377, author = {J. H. 0., Whitehead}, title = {Affine spaces of paths which are symmetrie about each point}, journal = {Mathematische Zeitschrift}, pages = {644--659}, publisher = {mathdoc}, volume = {35}, year = {1932}, zbl = {0004.41801}, url = {http://geodesic.mathdoc.fr/item/MZ_1932__35_168377/} }
J. H. 0., Whitehead. Affine spaces of paths which are symmetrie about each point. Mathematische Zeitschrift, Tome 35 (1932), pp. 644-659. http://geodesic.mathdoc.fr/item/MZ_1932__35_168377/