An iterative Clough-Tocher interpolant
ESAIM: Modélisation mathématique et analyse numérique, Topics in computer aided geometric design , Tome 26 (1992) no. 1, pp. 201-209. 
@article{M2AN_1992__26_1_201_0,
     author = {Farin, G. and Kashyap, P.},
     title = {An iterative {Clough-Tocher} interpolant},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {201--209},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {26},
     number = {1},
     year = {1992},
     mrnumber = {1155008},
     zbl = {0756.65002},
     language = {en},
     url = {http://archive.numdam.org/item/M2AN_1992__26_1_201_0/}
}
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Farin, G.; Kashyap, P. An iterative Clough-Tocher interpolant. ESAIM: Modélisation mathématique et analyse numérique, Topics in computer aided geometric design , Tome 26 (1992) no. 1, pp. 201-209. http://archive.numdam.org/item/M2AN_1992__26_1_201_0/

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