R. Kant
Department of Computer Science and Engineering
Indian Institute of Technology
Madras, India - 500 036
C.P. Rangan
Department of Computer Science and Engineering
Indian Institute of Technology
Madras, India - 500 036
D. Wagner
Universität Konstanz
Fakultät für Mathematik und Informatik, Fach D 188
D-78457 Konstanz
Report B 99-19
December 1999
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