J. H.  Cane, ?Soils of ground-nesting bees (Hymenoptera: Apoidea): texture, moisture, cell depth and climate?, Journal of the Kansas Entomological Society, vol. 64, pp. 406 - 413, 1991.

T.  Roulston, Sampson, B., and Cane, J. H., ?Squash and pumpkin pollinators plentiful in Alabama?, vol. 43, pp. 19 - 20, 1996.