%0 Journal Article %A Marcum, Howard J. %T Cone length of the exterior join %J Glasgow mathematical journal %D 1998 %P 445-461 %V 40 %N 3 %U http://geodesic.mathdoc.fr/articles/10.1017/S001708950003278X/ %R 10.1017/S001708950003278X %F 10_1017_S001708950003278X