Jongkittanakul, S., and P. Anilabol. “The Optimal Region for Occipital Screw Placement: Computed Tomography Analysis of Occipital Bone Thickness”. Srinagarind Medical Journal, vol. 33, no. 6, Oct. 2018, pp. 526-30, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/149323.