Therese C. Biedl,
Timothy Moon-Yew Chan,
Erik D. Demaine,
Martin L. Demaine,
Paul Nijjar,
Ryuhei Uehara,
and Ming-Wei Wang
Proc. 14th Canad. Conf. Computational Geometry (CCCG), Stephen Wismath, ed., Univ. of Lethbridge, Dept. of Mathematics and Computer Science, Aug 2002, pp. 105–108
http://www.cs.uleth.ca/~wismath/cccg/papers/C95.ps
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