Averaging Aggregation Operators with Interval Pythagorean Trapezoidal Fuzzy Numbers and Their Application to Group Decision Making. Punjab University Journal of Mathematics, [S. l.], v. 50, n. 2, p. 141–164, 2018. Disponível em: https://pujm.pu.edu.pk/index.php/pujm/article/view/135. Acesso em: 29 jun. 2025.