Gul, H. ., J. Khan, M. M. Paracha, and S. M. Noor. “Efficacy of Combination Therapy With Topical Fixed Dose Adapalene 0.1% and Benzoyl Peroxide 2.5% Plus Doxycycline 200 Mg Oral Versus Oral Isotretinoin for the Treatment of Moderate to Severe Acne Vulgaris”. Journal of Pakistan Association of Dermatologists, vol. 34, no. 4, Oct. 2024, pp. 973-7, https://www.jpad.com.pk/index.php/jpad/article/view/2638.