Parvathy, C.R., and A. Sofia. “A Study on New Classes of Binary Soft Sets in Topological Rough Approximation Space”. Bulletin of the Karaganda University. Mathematics Series 112, no. 4 (December 29, 2023): 79–94. Accessed August 28, 2025. http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/607.