Ghaffari Moghaddam, M. et al. 2012. Application of the Artificial Neural Network and Response Surface Methodology Models for Predicting the Enzymatic Synthesis of Betulinic Acid Ester: A Comparative Study. Asian Journal of Chemistry. 25, 1 (Aug. 2012), 301–305. DOI:https://doi.org/10.14233/ajchem.2013.13010.