Bella, D.A., 1970, Dissolved oxygen variations in stratified lakes: American Society of Civil Engineers Journal of Sanitary Engineering, v. 96, no. SA-5, p. 1129-1146.
Odum, H.T., 1956, Primary production in flowing waters: Limnology and Oceanography, v. 1, no. 2, p. 102-117.
Slack, K.V., Averett, R.C., Greeson, P.E., and Lipscomb, R.G., 1973, Methods for collection and analysis of aquatic biological and microbiological samples: U.S. Geological Survey Techniques of Water-Resources Investigations, book 5, chap. A4, 165 p.