1. K.S. Fu, and A. Rosenfeld, “Pattern Recognition and Image Processing”, IEEE Trans. Computers, Vol. C-25, Dec. 1976.
2. K. S. Fu, Digital Pattern Recognition, Springer-Verlag, Second Edition, 1980.
3. J. Kittler, K. S. Fu and L. F. Pau, ed., Pattern Recognition: Theory and Applications, D. Reidel Publishing Co., 1982.
4. T. Pavlidis, Structural Pattern Recognition, Springer-Verlag, 1977.
5. K. S. Fu, Syntactic Pattern Recognition and Applications, PrenticeHall, 1982.