Mistar, J. et al. 2023. Systematic Literature Review: Research on Martial Arts Competition Using Vos Viewers in the 2018-2022 Google Scholar Database. Gladi : Jurnal Ilmu Keolahragaan. 14, 02 (Jun. 2023), 221–228. DOI:https://doi.org/10.21009/GJIK.142.08.