MEMARIAN, M.; ZARRATI, S.; KARIMI, S.; BAHRAMI, M. Comparative Evaluation of Retentive Properties of Two Compatible Ball Attachments in Mandibular Implant-Retained Overdentures: An In Vitro Study. Frontiers in Dentistry, v. 15, n. 2, p. 106-115, 27 fev. 2018.