1. Institute of Electrical and Energy SystemsFederal University of ItajubáItajubáMGBrazil
2. Decision Sciences, Economics & Finance DepartmentSchool of Business at North Carolina Central UniversityDurhamNCUSA
3. Nicholas School of EnvironmentDuke UniversityDurhamNCUSA
4. Institute of Production Engineering and ManagementFederal University of ItajubáItajubáMGBrazil