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Computers and Mathematics with Applications > 2012 > 64 > 8 > 2544-2557
Journal of Cleaner Production > 2009 > 17 > 2 > 255-264
Computers and Mathematics with Applications > 2012 > 64 > 8 > 2544-2557
Journal of Cleaner Production > 2009 > 17 > 2 > 255-264