Pfau, A, et al. “Nd:YAG Laser Hyperthermia in the Treatment of Recalcitrant Verrucae Vulgares (Regensburg’s technique)”. Acta Dermato-Venereologica, vol. 74, no. 3, May 1994, pp. 212-4, doi:10.2340/0001555574215216.