Cahyonugroho, O. H. ., Hariyanto, S. ., & Supriyanto, G. (2023). Applying Fluorescence Dissolved Organic Matter Spectra and Phytoplankton Biology Index for Assessing Urban River Quality. Journal of Mathematical and Fundamental Sciences, 54(3), 311-329. https://doi.org/10.5614/j.math.fund.sci.2023.54.3.3