%0 Journal Article %A Singh, K. D. %A Lane, N. D. %T Union and Extension of Arcs of Cyclic Order Three %J Canadian journal of mathematics %D 1968 %P 629-638 %V 20 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-061-4/ %R 10.4153/CJM-1968-061-4 %F 10_4153_CJM_1968_061_4