K. Dopytalska, P. Sobolewski, M. Roszkiewicz, A. Mikucka-Wituszyńska, E. Szymańska, and I. Walecka, “Pyoderma gangrenosum ‒ cutaneous and extracutaneous manifestations”, wm, vol. 1, no. 1, pp. 7-9, Aug. 2019.