1. Aber, J. D. and J. M. Melillo. 1991. Terrestrial Ecosystems. Saunders College Publishing, Orlando, FL, USA.
2. Begg, C. S., O. W. Archibold, and L. Delanoy. 1998. Preliminary investigation into the effects of water-level control on seedling recruitment in riparian cottonwoods, Populus deltoides, on the South Saskatchewan River. Canadian Field-Naturalist 112:684–693.
3. Braatne, J. H., S. B. Rood, and P. E. Heilman. 1996. Life history, ecology, and conservation of riparian cottonwoods in North America. p. 57–85. In R. F. Stettler, H. D. Bradshaw, P. E. Heilman, and R. M. Hinckley (eds.) Biology of Populus and Its Implications for Management and Conservation. NRC Research Press. Ottawa. Ontario, Canada.
4. Chapin, F. S. 1993. Physiological controls over plant establishment in primary succession. p. 161–178. In J. Miles and D. W. H. Walton (eds.) Primary Succession on Land. Blackwell Scientific Publication, Oxford, England.
5. Cooper, D. J., D. M. Merritt, D. C. Andersen, and R. A. Chimner. 1999. Factors controlling the establishment of Fremont cotton-wood seedlings on the Upper Green River, USA. Regulated Rivers—Research & Management 15:419–440.