Hovsepyan, K.H., and A.V. Tsutsulyan. “$K$-GROUPS OF SOME SUBALGEBRAS OF THE TOEPLITZ ALGEBRA”. Proceedings of the YSU A: Physical and Mathematical Sciences 51, no. 3 (244) (December 15, 2017): 224–230. Accessed May 20, 2024. https://journals.ysu.am/index.php/proceedings-phys-math/article/view/vol51_no3_2017_pp224-230.