Problems with defining barycentric coordinates for the sphere
ESAIM: Modélisation mathématique et analyse numérique, Topics in computer aided geometric design , Tome 26 (1992) no. 1, pp. 37-49. 
@article{M2AN_1992__26_1_37_0,
     author = {Brown, J. L. and Worsey, A. J.},
     title = {Problems with defining barycentric coordinates for the sphere},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {37--49},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {26},
     number = {1},
     year = {1992},
     mrnumber = {1154999},
     zbl = {0748.65014},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1992__26_1_37_0/}
}
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Brown, J. L.; Worsey, A. J. Problems with defining barycentric coordinates for the sphere. ESAIM: Modélisation mathématique et analyse numérique, Topics in computer aided geometric design , Tome 26 (1992) no. 1, pp. 37-49. http://www.numdam.org/item/M2AN_1992__26_1_37_0/

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