Abdullah Gh. Amran, e Mansour Ali S. Ataa. 2012. “Statistical Analysis of the Prevalence, Severity and Some Possible Etiologic Factors of Gingival Recessions Among the Adult Population of Thamar City, Yemen”. Revista Sul-Brasileira De Odontologia 8 (3):305-13. https://doi.org/10.21726/rsbo.v8i3.1076.