1. Automatic recognition of printed and script;Harmon;Proc. IEEE,1972
2. Experiments with automatic input of handwritten numerical data into a large administration system;Spanjersberg;IEEE Trans. Man Cybernet.,1978
3. L.R. Focht, A. Burger, A numeric script recognition processor for postal zip code application, International Conference on Cybernetics and Society, 1976, pp. 486–492.
4. J. Schuermann, Reading machines, Sixth International Conference on Pattern Recognition, 1982, pp. 741–745.
5. R. Plamondon, R. Baron, On-line recognition of handprinted schematic pseudocode for automatic Fortran code generator, Eigth International Conference on Pattern Recognition. 1986, pp. 741–745.