%0 Journal Article %A Ruse, H. S. %T The Cayley-Spottiswoode coordinates of a conic in 3-space %J Compositio Mathematica %D 1935 %P 438-462 %V 2 %I Johnson Reprint Corporation %U http://www.numdam.org/item/CM_1935__2__438_0/ %G en %F CM_1935__2__438_0