1. Allard, R.W., 1960. Principles of Plant Breeding. Wiley, New York.
2. Anderson, N.O., 2001. New ornamental crops: A primary source of invasive species? Chicago Botanic Garden, New Ornamental Crops Research Symposium Program and Abstracts, Sept. 26–29, 2001, p. 13.
3. Anderson, N., 2004a. Invasive horticultural crops (part 1): Why be concerned? Minnesota Nursery and Landscape Association, MNLA News 28(3): 36–40.
4. Anderson, N., 2004b. Invasive horticultural crops (part 2): Where do they come from? Minnesota Nursery and Landscape Association, MNLA News 28(4): 28–33.
5. Anderson, N., 2004c. Invasive horticultural crops (part 3): Who's monitoring and controlling them? Minnesota Nursery and Landscape Association, MNLA News 28(6): 45–47.