1. H. Yokoi, T. Suzuki, K. Suzuki and T. Nakagawa; Manufacturing of Blanking Tool and its Die-Set by Laminating Laser-Cut Steel Sheets: Proc. of the 12th NAMRC, 372–378, 1984
2. M. Kunieda, T. Nakagawa; Manufacturing of Laminated Deep Drawing Dies by Laser Beam Cutting: Proc. of the 1st I.C.T.P. Tokyo, 520–525, 1984