ОvsepyanK. H. (2017). Type of some nuclear subalgebras of the Toeplitz algebra generated by the inverse subsemigroups of a bicyclic semigroup. Ukrains’kyi Matematychnyi Zhurnal, 69(11), 1551-1563. Retrieved from http://umj.imath.kiev.ua/index.php/umj/article/view/1802