Local optimization-based untangling algorithms for quadrilateral meshes

Lori A. Freitag and Paul E. Plassman
Proc. 10th Int. Meshing Roundtable, Sandia Nat. Lab., Oct 2001, pp. 397–406

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Optimal point placement for mesh smoothing

Fano Experimental Web Server, D. Eppstein, School of Information & Computer Science, UC Irvine