D. A. A. Gita Sugandhi and P. E. V. Nandanaya Bharata, “Efficacy and Safety of Topical Tretinoin Monotherapy versus Vehicle in the Treatment of Acne Vulgaris: A Meta-Analysis of Randomised Controlled Trials”, sjdv, vol. 3, no. 2, pp. 86-95, Jul. 2026.