@article{GDZPPN002373793,
title = {Affine spaces of paths which are symmetrie about each point},
journal = {Mathematische Zeitschrift},
volume = {34},
year = {1932},
pages = {644-659},
zbl = {0004.41801},
url = {http://dml.mathdoc.fr/item/GDZPPN002373793}
}
Whitehead, J. H. 0.,. Affine spaces of paths which are symmetrie about each point. Mathematische Zeitschrift, Tome 34 (1932) pp. 644-659. http://gdmltest.u-ga.fr/item/GDZPPN002373793/