Sobral, Marcos, Ana Paula Costa, and Adiel Almeida Filho. “Multi-Criteria Model for Classifying Clients of Companies Distributing Liquefied Petroleum Gas”. Brazilian Journal of Operations & Production Management 7, no. 1 (August 8, 2010): 53-75. Accessed July 18, 2019. https://bjopm.emnuvens.com.br/bjopm/article/view/V7N1A3.