Kumar, I., and B. Kumar. “Incidence of Cavity Problems After Open Cavity Mastoidectomy and Perioperative Factors Involved in the Causation of Cavity Problems: An Observational Study”. International Journal of Health and Clinical Research, vol. 3, no. 12(S), Dec. 2020, pp. 244-7, https://ijhcr.com/index.php/ijhcr/article/view/673.