Siu-Wing Cheng
and Tamal K. Dey
Proc. 13th Symp. Discrete Algorithms, ACM
and SIAM, Jan 2002, pp. 137–146
Tech. report HKUST-TCSC-2003-05, Hong Kong Univ. of Science & Tech., Dept. of Computer Science, May 2003
http://repository.ust.hk/retrieve/630/200305.pdf
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