First steps toward an electronic field guide for plantsv. 55597–610
Agarwal, G., Ling, H., Jacobs, D., Shirdhonkar, S., Kress, W. John, Russell, Rusty, Bourg, Norman, Belhumer, P., Dixit, N., Feiner, S., Mahajan, D., Sunkavalli, K., Ramamoorthi, R., and White, S. 2006. "First steps toward an electronic field guide for plants." Taxon, 55 597–610.