- Proceedings of the National Academy of Sciences of the United States of America
- Monarch research, GMO/toxins
Sears MK, Hellmich RL, Stanley-Horn DE, Oberhauser KS, Pleasants JM, Mattila HR, Siegfried BD, Dively GP. 2001. Impact of Bt corn pollen on monarch butterfly populations: A risk assessment. Proceedings of the National Academy of Sciences of the United States 98(21): 11937–11942.
- Eastern Breeding