Kharakhanian IM. ON THE EQUATION ${\bf{\it h}}x-x{\bf{\it k}}=c$ IN BANACH ALGEBRA ${\bf{\it A}}$, WITH HERMITIAN COEFFICIENTS ${\bf{\it h}}, {\bf{\it k}}$. Proc. YSU A: Phys. Math. Sci. [Internet]. 2002 Mar. 20 [cited 2026 Jan. 22];36(1 (197):3-8. Available from: https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol36_no1_2002_pp003-008