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Global Journal of Flexible Systems Management > 2015 > 16 > 2 > 145-156
International Journal of Industrial Organization > 1995 > 13 > 4 > 441-457
International Journal of Industrial Organization > 1995 > 13 > 4 > 413-419
Global Journal of Flexible Systems Management > 2015 > 16 > 2 > 145-156
International Journal of Industrial Organization > 1995 > 13 > 4 > 441-457
International Journal of Industrial Organization > 1995 > 13 > 4 > 413-419