1. Pattern Recognition: Human and Mechanical;Watanabe,1985
2. Pattern Classification and Scene Analysis, volume 3;Duda,1973
3. Statistical pattern recognition: A review;Jain;IEEE Trans. Pattern Anal. Mach. Intell.,2000
4. Shape description by region analysis;Pavlidis,1977
5. Syntactic Pattern Recognition: An Introduction;Gonzalez,1978