1. Advances in recognition of handprinted characters;Suen,1978
2. Advances in recognition of Chinese characters;Mori,1980
3. An improvement of correlation method for character recognition;Yasuda;J. IECE Japan,1979
4. Clustering of Chinese characters;Sakai;Trans. IECE Japan,1973
5. Rough classification of handprinted Chinese characters by stroke density function;Naito;Trans. IECE Japan,1979