R. G. Smith, Jabbour, R., Hulting, A. G., Barbercheck, M. E., and Mortensen, D. A.,
“Effects of Initial Seed-Bank Density on Weed Seedling Emergence during the Transition to an Organic Feed-Grain Crop Rotation”,
Weed Science, vol. 57, no. 05, pp. 533 - 540, 2009.