Abhang, Suchita R., et al. “Estimation of Nortriptyline Hydrochloride in Bulk and Formulation by UV-Spectrophotometric Area Under Curve Method”. Journal of Drug Delivery and Therapeutics, vol. 9, no. 3, May 2019, pp. 147-50, https://doi.org/10.22270/jddt.v9i3.2628.