Discussiones Mathematicae Graph Theory 27(3) (2007)
553-558
doi: 10.7151/dmgt.1380
Pooya Hatami
Department of Mathematical Sciences
Sharif University of Technology
Tehran, Iran
e-mail: p_hatami@ce.sharif.edu
Keywords: covering, total covering, approximation algorithm.
2000 Mathematics Subject Classification: 05C69.
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Received 20 September 2006
Revised 30 December 2006
Accepted 3 January 2007