P. Natraj, S. Sandhiya, and K. Selvakumari. “FUZZY SETS AND ITS APPLICATION IN DECISION MAKING PROBLEMS BY COMPARING THREE METHODS”. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 17, no. 7, Nov. 2020, pp. 4841-8, https://archives.palarch.nl/index.php/jae/article/view/2603.