Manikya Sastry Thuttagunta, Ramakrishna Karipeddi, Santosh Kumar Nadikatla, Surekha Pinninti, and S. K. . Badampudi, “Development and validation of a visible spectrophotometric method for the determination of tretinoin in bulk and pharmaceutical formulations”, J. Appl. Pharm. Res., vol. 14, no. 2, pp. 112-117, Mar. 2026.