Jassim, Saheb K., and Israa Z. Shamkhi. 2017. “Approximation of Functions in Lp, α (I) (0 < P < 1)”. Ibn AL-Haitham Journal For Pure and Applied Sciences 26 (2):334-47. https://jih.uobaghdad.edu.iq/index.php/j/article/view/481.