ZabavskiiB. V., and PetrichkovichV. M. “On the Stable Range of Matrix Rings”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 11 (November 25, 2009): 1575-1578. Accessed November 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3123.