Bekele, Tolesa Dekeba. “Fuzzy Soft Positive Implicative Hyper BCK-Ideals”. Journal of Informatics and Mathematical Sciences 13, no. 2 (August 10, 2021): 105–117. Accessed April 24, 2024. http://rgnpublications.com/journals/index.php/jims/article/view/1651.