1. Ain, C., Rudiyanti, S., Haeruddin, & Sari, H. P. (2019). Purification capacity and oxygen sag in Sringin river, Semarang. International Journal of Applied Environmental Sciences, 14, 1–16. ISSN 0973-6077.
2. Adeney, W. E., & Becker, H. G. (1921). The determination of the rate of solution of atmospheric nitrogen and oxygen by water. Philosophical Magazine Series 6, 42(247), 87–96. https://doi.org/10.1080/14786442108633734
3. Bronfman, A. M. (1992). Black Sea environment, self-purification in the context of the problems of anthropogenic ecology of the sea. GeoJournal, 27(2), 141–148. https://doi.org/10.2307/41145452. http://www.jstor.org/stable/41145452
4. Butts, T. A., & Evans, R. L. (1978). Sediment oxygen demand studies of selected Northeastern Illinois streams. Circular 129, State of Illinois, Department of registration and education. https://www.isws.illinois.edu/pubdoc/C/ISWSC-129.pdf
5. Horne, A. J., & Goldman, C. R. (1994). Limnology (2nd ed., pp. 576). McGraw-Hill, Inc. https://sswm.info/sites/default/files/reference_attachments/HORNE%20and%20GOLDMAN%201994%20Understanding%20Lake%20Ecology.pdf. https://www.enr.gov.nt.ca/sites/enr/files/dissolved_oxygen.pdf