@article{10_4153_CJM_1968_041_1,
     author = {Whitley, Robert},
     title = {The {Size} of the {Unit} {Sphere}},
     journal = {Canadian journal of mathematics},
     pages = {450--455},
     year = {1968},
     volume = {20},
     number = {1},
     doi = {10.4153/CJM-1968-041-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1968-041-1/}
}