Thomson, James D., Jessica R. K. Forrest, and Jane E. Ogilvie. “Pollinator Exclusion Devices Permitting Easy Access to Flowers of Small Herbaceous Plants”. Journal of Pollination Ecology 4 (May 10, 2011): 24–25. Accessed April 28, 2026. https://pollinationecology.org/index.php/jpe/article/view/104.