Stasek, David J.; Bean, Caitlin; Crist, Thomas O. . (2008). Butterfly Abundance and Movements Among Prairie Patches: The Roles of Habitat Quality, Edge, and Forest Matrix Permeability. Environmental Entomology, 37(4), 897–906.
doi:10.1603/0046-225X(2008)37[897:BAAMAP]2.0.CO;2