Cahyonugroho, O.H. , Hariyanto, S. and 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 (May 2023), 311-329. DOI:https://doi.org/10.5614/j.math.fund.sci.2023.54.3.3.