Rachmanto, A., and A. Arif. “Relationship of the Severity of Maxillofacial Trauma Based on Facial Injury Severity Scale (FISS) Against the Severity of Head Injury”. Sriwijaya Journal of Surgery, Vol. 2, no. 1, June 2019, pp. 9-21, doi:10.37275/sjs.v2i1.12.