Noerochim, Lukman, Gita Akbar Satriawangsa, and Amien Widodo. 2016. “Recovery of Lithium from Geothermal Fluid at Lumpur Sidoarjo by Adsorption Method”. Journal of Engineering and Technological Sciences 48 (2):200-206. https://doi.org/10.5614/j.eng.technol.sci.2016.48.2.6.