%0 Journal Article %A Turgeon, J. %T On the Rank Numbers of an Arc %J Canadian journal of mathematics %D 1970 %P 789-802 %V 22 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-089-6/ %R 10.4153/CJM-1970-089-6 %F 10_4153_CJM_1970_089_6