1. An objective method of recording and comparing the shapes of carrot roots;Bleasdale;J. Hort. Sci.,1963
2. Genstat 5 Committee, 1993. Genstat 5 Reference Manual, Clarendon Press, Oxford.
3. The statistical analysis of plant part appearance — a review;Horgan;Comput. Electron. Agric.,2000
4. An automated machine vision system for the morphometry of new cultivars and plant genebank accessions;Keefe;Plant Varieties Seeds,1988
5. Principles of Multvariate Analysis: A User's Perspective;Krzanowski,1993