Ferran Hurtado Diaz,
Marc Noy,
and Jorge Urrutia
Discrete & Computational Geometry 22(3):333–346, Oct 1999
Proc. 12th Symp. Computational Geometry, ACM, May 1996, pp. 214–223
http://www.csi.uottawa.ca/~jorge/online_papers/Flipping.ps.gz
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