Stratum, tree, and flower selection by tropical bees: implications for the reproductive biology of outcrossing Cochlospermum vitifolium in Panamav. 63No. 3712–720
Roubik, David Ward, Ackerman, James D., Copenhaver, Christine, and Smith, Brian H. 1982. "Stratum, tree, and flower selection by tropical bees: implications for the reproductive biology of outcrossing Cochlospermum vitifolium in Panama." Ecology, 63, (3) 712–720.