An approach to combined Laplacian and optimization-based smoothing for triangular, quadrilateral, and quad-dominant meshes
Scott A. Canann,
Joseph R. Tristano,
and Matthew L. Staten
Proc. 7th Int. Meshing Roundtable, Sandia Nat. Lab., Oct 1998, pp. 479–494
http://www.andrew.cmu.edu/user/sowen/abstracts/Ca513.html
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