Bertolani, M., M. B. de Felici del Giudice, E. Ridolo, F. Pucciarini, C. Feliciani, and F. Satolli. “Skin Reaction to COVID-19 Vaccine: A Report of 4 Cases”. Dermatology Reports, vol. 14, no. 3, July 2022, doi:10.4081/dr.2022.9376.