Yeşilkayagil Savaşcı, M., & Başar, F. (2024). The generalised double Hahn sequence space $H_\vartheta^{d}$. Acta Mathematica Universitatis Comenianae, 93(2), 101-114. Retrieved from http://www.iam.fmph.uniba.sk/amuc/ojs/index.php/amuc/article/view/2117