Kusumawardhani, P. I. ., K. E. . Tarman, and B. M. . Soegiharto. “Difference in Orthodontic Patients’ Perceptions of Essix and Hawley Retainers”. Pesquisa Brasileira Em Odontopediatria E Clínica Integrada, vol. 21, Nov. 2021, p. e6063, https://revista.uepb.edu.br/PBOCI/article/view/774.