1. Barbour, M.T., Gerritsen, J., Snyder, B.D., Stribling, J.B., 1999. Rapid Bioassessment Protocols for Use in Streams and Wadeable Rivers: Periphyton, Benthic Macroinvertebrates and Fish. EPA-841-B-99-002, U.S. Environmental Protection Agency, Office of Water, Washington, DC.
2. Butcher, J.T., Stewart, P.M., Simon, T.P., 2003. A Benthic Community Index for streams in the Northern Lakes and Forests Ecoregion. Ecol. Indicat.,doi: 10.1016/S1470-160X(03)00042-6.
3. Chirhart, J., 1998. Invertebrate sampling procedures for Northern Lakes and Forests Streams. In: Simon, T.P., Stewart, P.M. (Eds.), Standard Operating Procedures for Development of Watershed Indicators in REMAP: Northern Lakes and Forests Streams. U.S. Environmental Protection Agency, Region 5, Water Division, Watershed and NonPoint Source Branch, Chicago, IL.
4. A method of linking multivariate community structure to environmental variables;Clarke;Mar. Ecol. Prog. Ser.,1993
5. Clarke, K.R., Warwick, R.M., 1994. Change in Marine Communities: An Approach to Statistical Analysis and Interpretation. Natural Environment Research Council, UK.