2026. Water Quality Status of the Sanga-Sanga River, East Kalimantan, determined with the Pollution Index Method under high- and low-tide conditions. Jurnal Ilmu Perikanan Tropis Nusantara (Nusantara Tropical Fisheries Science Journal). 5, 2 (Aug. 2026), 171–176. DOI:https://doi.org/10.30872/tjt1nj72.