Wanjala, V. and Obiero , B. A. (2025) β€œON CLASS (BD) OPERATORS OF ORDER (n+k)”, International Research Journal of Rongo University, 3(1), pp. 22–27. Available at: http://journals.rongovarsity.ac.ke/index.php/IJORU/article/view/85 (Accessed: 3 August 2025).