1. Bulanon, D., Burks, T. F., Alchanatis, V. 2009. Fruit visibility analysis for robotic citrus harvesting. Trans. ASABE 52: 277–283.
2. Machine vision technology for agricultural applications
3. D'Esnon, A. G., Rabatel, G., Pellenc, R. 1987. Magali: A self-propelled robot to pick apples. ASAE Paper No.87–1037. St. Joseph, Mich.: ASAE.
4. Duin, R. P. W., Juszczak, P., Paclik, P., Pekalska, E., de Ridder, D., Tax, D. M. J., Verzakov, S. 2007. PRTools4.1, A Matlab Toolbox for Pattern Recognition. Delft University of Technology.
5. Florida Agricultural Statistics Service (FASS) 2008. 2005–2006 Season Citrus Highlights. Availableat: http: //www.nass.usda.gov/statistics_by_state/Florida/Publications/Annual_Statistical_Bulletin/fasd07p.htm. Accessed: November 5, 2008.