Hussein Oleiwi, N. A., and M. Farhan Hussein. “The Aesthetic Religious Symbol of The First Abbasid Era : Bashar Ibn Barad – Ibn AL Rumi ,AS Models”. Opción, Vol. 35, Aug. 2019, pp. 2899-21, https://produccioncientificaluz.org/index.php/opcion/article/view/30540.