Malik, Sapna, and Rajesh K. Singh. “Microwave Assisted Synthesis of 1-Amidoalkyl-2-Naphthols Catalyzed by Anhydrous Zinc Chloride”. Asian Journal of Chemistry, vol. 24, no. 12, Aug. 2012, pp. 5669-72, https://asianpubs.org/index.php/ajchem/article/view/9950.