%0 Journal Article %A Schouten, J. A. %A Van Dantzig, D. %T On ordinary quantities and $W$-quantities. Classification and geometrical applications %J Compositio Mathematica %D 1940 %P 447-473 %V 7 %I Johnson Reprint Corporation %U http://archive.numdam.org/item/CM_1940__7__447_0/ %G en %F CM_1940__7__447_0