S. Ali, Diar, ديار, Kamal M. Mahmoud, and كمال. “Isolation and Identification of a Pigment from Grape for Use As Acid-Base Indicator”. Rafidain Journal of Science 17, no. 7 (June 24, 2025): 121–133. Accessed August 10, 2025. https://rjps.uomosul.edu.iq/index.php/rsci/article/view/11755.