Y. Shandala, M., M. M. Al-Shamamry, H. A. A. Al-Wahab, and R. G. Salih. “Physico-Chemical Study of Some Cross Conjugated Systems, Part II”. Journal of Education and Science (JES) 24, no. 3 (November 30, 1999): 1–13. Accessed August 6, 2025. https://ojs.uomosul.edu.iq/index.php/edusj/article/view/23732.