Liu, R. D., & Zhang, J. (2011). Synthesis and optimization of methyl 5-acetyl-1,4-dihydro-2,6-dimethyl-4-(substituent benzylidene)pyridine-3-carboxylate. European Journal of Chemistry, 2(3), 308–310. https://doi.org/10.5155/eurjchem.2.3.308-310.126