1. Analyse statistique à plusieurs variables;Dagnelie,1975
2. Machine vision inspection of Golden Delicious apples;Heinemann,1995
3. Journal of European Community n° L97/19, Norme de qualité des pommes et poires de tables réglement CEE 920/89. 11-04-89.
4. Peach maturity grading with color computer vision;Singh;1992 International Summer Meeting - ASAE meeting presentation,1992
5. Machine vision inspection of potatoes and apples;Tao;Trans. of the ASAE,1995