Karuna Kumar, B., et al. “Gradient High Performance Liquid Chromatography Method for Determination of Related Substances in (7-{4-[4-(1-Benzothiophen-4-YL] Butoxy} Quinolin-2(1H)-One) Dosage Form”. Journal of Drug Delivery and Therapeutics, vol. 9, no. 1-s, Feb. 2019, pp. 36-43, https://doi.org/10.22270/jddt.v9i1-s.2241.