Accounting of Tooling Costs in Optimization of Cold Forging Processes. - Guobin Yang; Yoshinori Maekawa; Kojiro Oka (Towards World Class Manufacturing, 1993)

Study on construction of CDMA transmission simulator using SH3 microcomputer board. - Eisuke Kudoh; Kojiro Oka; Kenichi Suzuki (ICUFN, 2016)