Luiz Velho,  Luiz Henrique de Figueiredo,  Jonas Gomes. 

We discuss the problem of adaptive polygonization of regular surfaces of the euclidean 3D space, and present effective algorithms for computing optimal polygonizations of surfaces described in parametric or implicit form

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-65001997000100003&lng=e

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