1. Japanese Ministry of International Trade and Industry, International Business Affairs Division of Industrial Policy Bureau, Enterprise Statistics Division of Research and Statistics Department. Dai Roku Kai Kaigai Jigyokatsudo Kihon Chosa Hokoku (Highlights of the 6th basic survey of overseas business activities of Japanese companies-definitereport- Japanese edition). Tokyo: Japanese Ministry of International and Trading, 1997, p. 40.
2. Japanese Science and Technology Agency. Minkan-kigyo no Kenkyb-Katsudo ni kansuru Chosa-Hokoku (Report on the survey of the R&D activities by Japanese private companies. Japanese edition). Tokyo: Printing Bureau of Japanese Ministry of Finance, 1996, p. 19.
3. R and D Planning Techniques