References
- Hooper, F., 1969: Eutrophication Indices and Their Relation to other Indices of Ecosystem Change. — In: Eutrophication: Causes, Consequences, Correctives. National Academy of Sciences, Washington.
- Hutchinson, G. E., 1938: On the Relation between the Oxygen Deficit and the Productivity and Typology of Lakes. — Int. Rev. Hydrobiol. 36, 336–355.
- Hutchinson, G. E., 1957: A Treatise on Limnology. I. — John Wiley, New York.