Gualerzi, A., L. Cornaghi, M. Sciarabba, and E. Donetti. “Morphological Analysis of the Acute Effects of Cigarette Smoke on Normal Human Oral Mucosa Explants”. Italian Journal of Anatomy and Embryology, vol. 117, no. 2, Feb. 2013, p. 85, https://oajournals.fupress.net/index.php/ijae/article/view/4271.