“Semi - Empirical Molecular Orbital and UV- Visible Study of the Charge Transfer Complex of 1- Ethyl -4- (methoxycarbonyl) Pyridinium Iodide”. Al-Nahrain Journal of Science, vol. 9, no. 1, June 2006, pp. 29-33, https://anjs.edu.iq/index.php/anjs/article/view/1689.