Arora, Kishore, and D. Kumar. “Semi-Empirical AM1 and PM3 Calculations for Electronic Structure of a Pyrazolone”. Asian Journal of Chemistry 13, no. 4 (March 30, 2010): 1325–1329. Accessed July 23, 2024. https://asianpubs.org/index.php/ajchem/article/view/22803.