G. UTHRA; K. THANGAVELU; R. M. UMAMAGESWARI. Ranking L-R Type Generalized Trapezoidal Fuzzy Numbers. International Journal of Mathematics And its Applications, [S. l.], v. 6, n. 1 - C, p. 411–416, 2018. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1082. Acesso em: 3 jul. 2024.