@article{10_4153_CMB_1975_088_8,
     author = {Betts, J. R. and Thompson, A. C.},
     title = {Three {Remarks} on the {Measurement} of {Unit} {Spheres}},
     journal = {Canadian mathematical bulletin},
     pages = {485--488},
     year = {1975},
     volume = {18},
     number = {4},
     doi = {10.4153/CMB-1975-088-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-088-8/}
}