Gutman, Ivan, and Slavko Slavko Radenković. “A Simple Formula for Calculating Resonance Energy of Benzenoid Hydrocarbons”. Macedonian Journal of Chemistry and Chemical Engineering 25, no. 1 (June 15, 2006): 17–21. Accessed July 15, 2024. https://mjcce.org.mk/index.php/MJCCE/article/view/274.