Ettayb, Jawad. “On the Operator Equation ABA=ACA and Its Generalization on Non-Archimedean Banach Spaces”. International Journal of Maps in Mathematics 7, no. 2 (September 1, 2024): 224–235. Accessed November 22, 2024. https://simadp.com/journalmim/article/view/7-2-7.