Sungkono, S. and Grandis, H. 2021. Improved Modified Symbiosis Organisms Search (IMSOS): A New and Adaptive Approach for Determining Model Parameters from Geoelectrical Data. Journal of Engineering and Technological Sciences. 53, 5 (Nov. 2021), 210505. DOI:https://doi.org/10.5614/j.eng.technol.sci.2021.53.5.5.