- Addressing data deficiency in classifying extinction risk: a case study of a radiation of Bignoniaceae from Madagascar
2006. Conservation Biology 20: 1099-1110
- Wild bee species increase tomato production but respond differently to surrounding land use in Northern California
2006. Biological Conservation 133: 81-87
- Wild bees enhance honey bee’s pollination of hybrid sunflower
2006. Proceedings of the National Academy of Science, 103: 13890-13895.
- Effects of cultivation and proximity to natural habitat on ground-nesting bees in California sunflower fields
2006. Journal of Kansas Entomological Society, 79: 309-320.