@article{01283605, title = {Surface normals and barycentric coordinates.}, journal = {Mathematical Problems in Engineering}, volume = {2}, year = {1996}, pages = {487-497}, doi = {10.1155/S1024123X96000440}, zbl = {0943.53005}, language = {en}, url = {http://dml.mathdoc.fr/item/01283605} }
Mullineux, Glen. Surface normals and barycentric coordinates.. Mathematical Problems in Engineering, Tome 2 (1996) pp. 487-497. doi : 10.1155/S1024123X96000440. http://gdmltest.u-ga.fr/item/01283605/