TAGHI-GANJI, K.M., et al. “Synthesis and Characterization of Some 1,4-Dihydropyridine Derivatives Containing Dichlorothiazolyl Substituents”. Asian Journal of Chemistry, vol. 19, no. 4, Mar. 2010, pp. 2521-6, https://asianpubs.org/index.php/ajchem/article/view/13337.