Subrata, G., Z. Hasratiningsih, E. Kurnikasari, and T. Dirgantara. 2009. “Evaluation of Seat and Non-Seat Post Preparation Design Using Conventional and Computational Methods”. Dental Journal 42 (4):179-84. https://doi.org/10.20473/j.djmkg.v42.i4.p179-184.