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Computers and Mathematics with Applications > 2009 > 58 > 1 > 1-10
Expert Systems With Applications > 2009 > 36 > 2 Part 1 > 2503-2512
Mathematical Methods of Operations Research > 2009 > 69 > 3 > 395-410
Ekonomia Menedżerska > 2007 > nr 2 > 31-44