Firmansyah, D., Agustawijaya, D. S. and Murtiadi, S. (2023) “Optimisation of rock mass quality parameters for the initial geotechnical investigation of a vertical shaft: Gosowong Gold Mine Project Case Study - North Halmahera”, RESEARCH REVIEW International Journal of Multidisciplinary, 8(11), pp. 20–26. doi: 10.31305/rrijm.2023.v08.n11.004.