1. European Space Agency Industrial Policy Committee (Procurement proposal): ESA/IPC (2001), add. 19, Paris, 17, April 2001, pp.1-7.
2. T. Onaka, Y. Sugiyama, S. Miura: Proc. of SPIE, 1998, 3354, pp.900-903.
3. H. Ohmori, T. Nakagawa: Annals of the CIRP, Vol. 39 (1990), No. 1, pp.320-323.
4. H. Ohmori, T. Nakagawa: Annals of the CIRP, Vol. 44 (1995), No. 1, pp.287-290.
5. H. Ohmori: Int. J. of JSPE, Vol. 26 (1992), No. 4, pp.273-276.