imran, zainab, and Mazin H. Suhhiem. “Legendre Operational Differential Matrix for Solving Fuzzy Differential Equations With Trapezoidal Fuzzy Function Coefficients”. Journal of Kufa for Mathematics and Computer, vol. 11, no. 2, May 2025, pp. 31-48, https://doi.org/10.31642/JoKMC/2018/110205.