%0 Journal Article %A Orlik, Peter %T On the ARF Invariant of an Involution %J Canadian journal of mathematics %D 1970 %P 519-524 %V 22 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-060-8/ %R 10.4153/CJM-1970-060-8 %F 10_4153_CJM_1970_060_8