Belal, A. O., M. M. B. Elmahdy, S. M. M. El Masry, and M. E. Elsayed. “A Comparative Clinical Study of Two Different Attachment Systems and Implant Stability in Implant-Supported Mandibular Overdentures”. Dental Journal, vol. 58, no. 4, Sept. 2025, pp. 330-5, https://e-journal.unair.ac.id/MKG/article/view/58335.