Santis, Rodrigo, Leonardo Golliat, and Eduardo Aguiar. “Multi-Criteria Supplier Selection Using Fuzzy Analytic Hierarchy Process: Case Study from a Brazilian Railway Operator”. Brazilian Journal of Operations & Production Management 14, no. 3 (September 6, 2017): 428-437. Accessed April 19, 2019. https://bjopm.emnuvens.com.br/bjopm/article/view/364.