1. Silven, O., Kanppinen., H.: Recent Developments in Wood Inspection. Int. Journal Pattern Recognition and Artificial Intelligence 10, (1996) 83–95.
2. Rosandich, R.G.: Intelligent Visual Inspection. Chapman Hall, London, (1997).
3. Kumar, A., Pang, G.K.H.: Defect Detection in Textured Materials Using Optimized Filters. IEEE Trans. Systems, Man, and Cybernetics-Part B, vol. 32,5, (2002) 553–570.
4. Lect Notes Comput Sci;M.A. Patricio,2001
5. Maravall, D., Patricio, M.A.: Image Segmentation and Pattern Recognition: A Novel Concept, the Histogram of Connected Elements. In D. Chen and X. Cheng (Eds). Pattern Recognition and String Matching, Kluwer Academic Publishers, (2002) 399–452.