Schueller, J.K. and Y.H. Bae. 1987. Spatially attributed automatic combine data acquisition. . 2(2):119-127.
Schueller, J.K. 1992. A review and integrating analysis of spatially-variable control of crop production. . 33:1-34.
Sui, Ruixiu, J. Alex Thomasson, Robert Mehrle, Matt Dale, Calvin Perry, and Glen Rains. 2004. Mississippi cotton yield monitor: beta test for commercialization. Computers and Electronics in Agriculture. 42(3):149-160.
Thomasson, J. Alex, and Ruixiu Sui. 2004. Optical-reflectance-based mass-flow sensor. U.S. Patent No. 6809821. published October 26.
UF. 2007. . accessed 21 September 2007. University of Florida.
Vellidis, G., C.D. Perry, G.C. Rains, D.L. Thomas, N. Wells, and C.K. Kvien. 2003. Simultaneous Assessment of Cotton Yield Monitors. . 19(3):259-272.
Vellidis, George, Calvin Perry, Tasha Wells, and Ed Barnes. unknown. Cotton Yield Monitors: The Entrance Exam and Final Exam for Precision Agriculture. brochure. Cotton Incorporated.
Wilkerson, John B., Fred H. Moody III, and Joseph S. Kirby. 1999. Real time volumetric flow sensor. U.S. Patent No. 5920018. published July 6.