Bonifazi, E., and A. Milano. “Rebound Effect in Subglottic Hemangioma Treated With Propranol. Usefulness of the Association Propranolol-Corticosteroids.”. European Journal of Pediatric Dermatology, vol. 22, no. 4, Dec. 2012, pp. 288 -9, https://ejpd.com/index.php/journal/article/view/811.