1. Allan, M. G., Hicks, B. J., & Brabyn, L. (2007). Remote sensing of water quality in the rotorua lakes, CBER contract report-51, 1–27, The University of WAIKATO.
2. Araoye, P. A. (2009). The seasonal variation of pH and Dissolved oxygen concentration in Asa lake llorin, Nigeria. International Journal of Physical Sciences, 4(5), 271–274.
3. Bartram, J., & Ballance, R. (1996). Water quality monitoring—a practical guide to the design and implementation of freshwater quality studies and monitoring programmes; published on behalf of United Nations Environment programme and the World Health Organization, ISBN 0-419-21730-4.
4. Bilgehan, N., Semih, E., Hakan, K., Ali, B., & David, M. (2010). An application of Landsat-5TM image data for water quality mapping in Lake Beysehir, Turkey. Water, Air, & Soil Pollution, 212(1–4), 183–197.
5. Carlson, R. E. (1977). A trophic state index for lakes. Limnology and Oceanography, 22(2), 361–369.