Tripathy, Binod Chandra, and Stuti Borgohain. “Difference Sequence Space (. ) of Fuzzy Real Numbers”. Mathematical Modelling and Analysis 13, no. 4 (December 31, 2008): 577-586. Accessed September 30, 2024. https://jeelm.vgtu.lt/index.php/MMA/article/view/7050.