Yuval Rabani,
Yuri Rabinovich,
and Alistair Sinclair
Random Structures & Algorithms 12(4):313–334, Jul 1998
Proc. 27th Symp. Theory of Computing, ACM, May 1995, pp. 83–92
http://wstud.cs.technion.ac.il/~rabani/pss/Publications/RabaniRS95.ps.gz
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