%0 Journal Article %A Ostrom, T. G. %T Replaceable Nets, Net Collineations, and Net Extensions %J Canadian journal of mathematics %D 1966 %P 666-672 %V 18 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1966-067-7/ %R 10.4153/CJM-1966-067-7 %F 10_4153_CJM_1966_067_7