Al Bal’awi, K., N. Obiedat, W. Haddad, and M. Tashli. “Fingers Extension on the Cello and Methods to Benefit from Them on the Oud”. Jordan Journal of the Arts, vol. 11, no. 1, Feb. 2024, https://jja.yu.edu.jo/index.php/jja/article/view/300.