Azfar, N. A., U. Rafique, R. Hafeez, and T. Rashid. “Case of Bullous Pyoderma Gangrenosum in a Child”. Journal of Pakistan Association of Dermatologists, vol. 27, no. 3, Mar. 2018, pp. 286-9, https://www.jpad.com.pk/index.php/jpad/article/view/1119.