Bakery, Awad. “Kannan Contraction Maps on the Space of Null Variable Exponent Second-Order Quantum Backward Difference Sequences of Soft Functions and Its Pre-Quasi Ideal”. Thai Journal of Mathematics 21, no. 3 (September 30, 2023): 445–480. Accessed May 2, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1520.