Hellmich, R. L., Siegfried, B. D., Sears, M. K., Stanley-Horn, D. E., Daniels, M. J., Mattila, H. R., . . . Lewis, L. C. (2001). Monarch larvae sensitivity to Bacillus thuringiensis- purified proteins and pollen. The National Academy of Sciences.

Hellmich, Richard L., Blair D. Siegfried, Mark K. Sears, Diane E. Stanley-Horn, Michael J. Daniels, Heather R. Mattila, Terrence Spencer, Keith G. Bidne, و Leslie C. Lewis. Monarch Larvae Sensitivity to Bacillus Thuringiensis- Purified Proteins and Pollen. The National Academy of Sciences, 2001.

Hellmich, Richard L., et al. Monarch Larvae Sensitivity to Bacillus Thuringiensis- Purified Proteins and Pollen. The National Academy of Sciences, 2001.