Macpherson, C., Chiang, K., Hall, R., Nowell, G., Castillo, P., & Thirlwall, M. (2010). Plio-Pleistocene intra-plate magmatism from the southern Sulu Arc, Semporna peninsula, Sabah, Borneo: Implications for high-Nb basalt in subduction zones. Journal of Volcanology and Geothermal Research, 190(1-2), 25-38. https://doi.org/10.1016/j.jvolgeores.2009.11.004