1. Y. Komiya and T. Matsumoto, “On-line Pen Input Signature Verification PPI (pen-Position/ pen-Pressure/ pen-Inclinations)”, Proc. IEEE SMC’99, Vol.4, pp. 41–46, 1999.
2. T. Ohishi, Y. Komiya and T. Matsumoto, “An On-Line Pen Input Signature Verification Algorithm”, Proc. IEEE ISPACS 2000, Vol.2, pp. 589–592, 2000.
3. T. Ohishi, Y. Komiya and T. Matsumoto, “On-line Signature Verification using Pen Position, Pen Pressure and Pen Inclination Trajectories”, Proc. ICPR 2000, Vol. 4, pp. 547–550, 2000.
4. D. Sakamoto, T. Ohishi, Y. Komiya, H. Morita and T. Matsumoto, “On-line Signature Verification Algorithm Incorporating Pen Position, Pen Pressure and Pen Inclination Trajectories”, Proc. IEEE ICASSP 2001, Vol. 2, pp. 993–996, 2001.
5. Y. Komiya, T. Ohishi, T. Matsumoto: “A Pen Input On-Line Signature Verifier Integrating Position, Pressure and Inclination Trajectories”, IEICE Trans. Information Systems, vol. E84-D, No.7, July, 2001.