V. Bhagat, S. Sadiq, R. Banal, and B. M. Gupta, “Comparative study of efficacy and safety of escitalopram versus opipramol in the treatment of major depressive disorder: one-year, prospective, open label, randomized and add on therapy in a tertiary care hospital”, Int J Basic Clin Pharmacol, vol. 15, no. 4, pp. 651–655, Jun. 2026.