Nur, H., T. Sumarsongko, L. Damayanti, and G. N. Alamsyah. “Influence of Class 2 Leverage of Lower Free-End Denture Toward Bone Resorption by Using Panoramic Radiographic”. International Journal of Medical Science and Clinical Invention, vol. 5, no. 11, Nov. 2018, pp. 4185-90, doi:10.18535/ijmsci/v5i11.08.