Akther, Thowhida, and Sanwar Uddin Ahmad. “A Computational Method for Fuzzy Arithmetic Operations”. Daffodil International University Journal of Science and Technology 4, no. 1 (February 8, 2010): 18–22. Accessed August 17, 2024. https://banglajol.info/index.php/DIUJST/article/view/4350.