Marshall Wayne Bern
and David Eppstein
Int. J. Computational Geometry & Applications 2(3):241–255, Sep 1992
Int. J. Computational Geometry & Applications 2(4):449–450, Dec 1992
Proc. 7th Symp. Computational Geometry, ACM, Jun 1991, pp. 342–350
Mathematical Reviews 94e:52016a
Mathematical Reviews 94e:52016b
http://www.ics.uci.edu/~eppstein/pubs/BerEpp-IJCGA-92.pdf
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