S. Chakravarthy Kotha, R. Doddipalla, H. Gandham, C. Swamy Rumalla, M. Kaliyaperumal, and S. Manchineni, “Degradation Studies of Tadalafil: Identification, Isolation and Structure Characterization of Stress Degradation Product using LC-MS, Mass Mediated Prep-HPLC, NMR, HRMS”, ajc, vol. 33, no. 4, pp. 827–832, Mar. 2021.