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ejge-4332	doi.org	https://doi.org/10.17979/ejge.2018.7.1.4332
ejge-4332	doi.org	https://doi.org/10.1016/s1389-9341(99)00004-0
ejge-4332	www.witpress.com	https://www.witpress.com/elibrary/sdp/12/5/1522
ejge-4332	www.sciepub.com	http://www.sciepub.com/ajie/content/4/1
ejge-4332	doi.org	https://doi.org/10.1016/s1389-9341(99)00004-0
ejge-4332	doi.org	https://doi.org/10.1111/j.1468-2427.2009.00901.x
ejge-4332	doi.org	https://doi.org/10.20460/jgsm.2012615779
ejge-4332	doi.org	https://doi.org/10.1177/014920638401000202
ejge-4332	doi.org	https://doi.org/10.1016/j.ejor.2004.04.028
ejge-4332	doi.org	https://doi.org/10.1111/j.1468-2427.2009.00901.x
ejge-4332	doi.org	https://doi.org/10.20460/jgsm.2012615779
ejge-4332	doi.org	https://doi.org/10.1177/014920638401000202
ejge-4332	www.sciencedirect.com	http://www.sciencedirect.com/science/journal/03772217/169/1
ejge-4332	doi.org	https://doi.org/10.1016/j.ejor.2004.04.028
ejge-4332	doi.org	https://doi.org/10.1016/j.ins.2007.01.001
ejge-4332	doi.org	https://doi.org/10.1016/j.ins.2007.01.001