Gabriela Alexe, Sorin Alexe, Yves Crama, Stephan Foldes, Peter L. Hammer, and Bruno Simeone Tech. report RRR-41-2002, Rutgers Univ., Ctr. for Operations Research, Dec 2002 http://rutcor.rutgers.edu/pub/rrr/reports2002/41_2002.pdf
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