F. Al-Mayahi, Noori, and Hayder K. Mohammed. “New Results on Soft Spectral in Soft Banach Algebra”. Journal of Al-Qadisiyah for computer science and mathematics 10, no. 3 (August 5, 2018): Math Page 1 - 7. Accessed August 30, 2021. http://www.qu.edu.iq/journalcm/index.php/journalcm/article/view/398.