Khalid, T., Maan, M.A. and Shehzad, K. 2016. Comparison of efficacy and safety of topical glyceryl trinitrate vs. oral nifedipine in idiopathic perniosis: results of a randomized clinical trial. Journal of Pakistan Association of Dermatologists. 24, 4 (Dec. 2016), 342–347. DOI:https://doi.org/10.66344/jpad.24.4.2014.224.