1. Business Management and Productivity Research Group, Industrial Engineering Program, Fundacio′n Universitaria Colombo International, Av. Pedro Heredia Sector Cuatro Vientos #31-50, Cartagena 130000, Colombia
2. Chemical Engineering Program, Nanomaterials and Computer-Aided Process Engineering, Piedra de Bolívar. Street 30 # 48-152, Cartagena 130000, Colombia