Problems with defining barycentric coordinates for the sphere
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 26 (1992) no. 1, p. 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: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
     publisher = {Dunod},
     volume = {26},
     number = {1},
     year = {1992},
     pages = {37-49},
     zbl = {0748.65014},
     mrnumber = {1154999},
     language = {en},
     url = {http://www.numdam.org/item/M2AN_1992__26_1_37_0}
}

Brown, J. L.; Worsey, A. J. Problems with defining barycentric coordinates for the sphere. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 26 (1992) no. 1, pp. 37-49. http://www.numdam.org/item/M2AN_1992__26_1_37_0/

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