Ecological distribution of breeding waterfowl populations in North Dakota. Strong, D. R., Jr., D. Simberloff, L. G. Abele, and A. B. Thistle, eds. Trauger, D. L., and J. H. Stoudt. Trends in waterfowl populations and habitats on study areas in Canadian parklands. Wiens, J. A. 1976.
Population responses to patchy environments.
Wiens, J. A. 1977. On competition and variable environments. Wiens, J. A. 1985. Pages 227-251 in M. L. Cody, ed. Habitat selection in birds.