Ortiz Torres, Maritza, Onailis Oramas Santos, and Magaly Sanz Pérez. “Method for Evaluating Suppliers With the Theory of Fuzzy Subsets. Application to Selected Suppliers of a Commercial Company”. Journal of Business, Universidad del Pacífico (Lima, Peru) 7, no. 1 (1): 2-19. Accessed June 3, 2020. http://revistas.up.edu.pe/index.php/business/article/view/69.