Brândaş, Adriana. “Trapezoidal Operator Preserving the Expected Interval and the Support of Fuzzy Numbers”. Rev. Anal. Numér. Théor. Approx. 40, no. 1 (February 1, 2011): 24–37. Accessed April 28, 2024. https://ictp.acad.ro/jnaat/journal/article/view/2011-vol40-no1-art3.