1. Cowardin, L. M., V. Carter, F. C. Golet, and E. T. LaRoe. 1979. Classification of wetlands and deepwater habitats of the United States. U.S. Fish and Wildlife Service Report FWS/OBS-79/31.
2. LaBaugh, J. W. 1986. Limnological characteristics of selected lakes in the Nebraska sandhills, U.S.A., and their relation to chemical characteristics of adjacent groundwater. Journal of Hydrology 86: 279–298.
3. LaBaugh, J. W., T. C. Winter, V. A. Adomaitis, and G. A. Swanson 1987. Geohydrology and chemistry of prairie wetlands in the Cottonwood Lake area, Stutsman County, North Dakota. U.S. Geological Survey Professional Paper 1431.
4. Likens, G. E., F. H. Bormann, R. F. Pierce, J. S. Eaton, and N. M. Johnson. 1977. Biogeochemistry of a Forested Ecosystem. Springer-Verlag, New York, NY, USA.
5. Carter, V., S. M. Locke, T. A. McConnaughey, and T. C. Winter. 1997. Stratigraphy and biological characteristics of sediments in Little Shingobee Fen. p. 193–197. In T. C. Winter (ed.) Hydrological and biogeochemical research in the Shingobee River headwaters area, north-central Minnesota. U.S. Geological Survey Water-Resources Investigations Report 96-4215.