Popoola, Bamidele Olubukola, Elizabeth Bosede Dosumu, and Joy Ucheonye Ifesanya. 2015. “Periodontal Status and Treatment Need Among Adolescents in Ibadan, Southwestern Nigeria”. Brazilian Journal of Oral Sciences 14 (2). Limeira, SP:117-21. https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640824.