Kawa, Maria, and Orhan Tuǧ. “On The Spectrum of the Matrix Operator A = (aₙₖ ) on Hahn Equence Space H”. EURASIAN JOURNAL OF SCIENCE AND ENGINEERING 8, no. 3 (December 21, 2022): 94–104. Accessed April 21, 2026. https://eajse.tiu.edu.iq/index.php/eajse/article/view/108.