Di Lella, F., A. Bacciu, E. Pasanisi, M. Ruberto, G. D’Angelo, and V. Vincenti. “Clinical Findings and Surgical Results of Middle Ear Cholesteatoma Behind an Intact Tympanic Membrane in Adults”. Acta Bio Medica Atenei Parmensis, Vol. 87, no. 1, May 2016, pp. 64-69, https://mattioli1885journals.com/index.php/actabiomedica/article/view/4153.