@article{10_1017_S001708950003278X,
     author = {Marcum, Howard J.},
     title = {Cone length of the exterior join},
     journal = {Glasgow mathematical journal},
     pages = {445--461},
     year = {1998},
     volume = {40},
     number = {3},
     doi = {10.1017/S001708950003278X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950003278X/}
}