1. The next large helical devices
2. J. Bacon, Concurrent systems, Addison-Wesley, 1996 (Japanese translation: Toppan, Tokyo, 1996), ISBN 4-8101-8067-0.
3. O2 System Administration Guide, O2 Technology, France, 1996.
4. I. Keiju, Object-Oriented Programming, ASCII, Tokyo, 1993, 4-7561-0273-3.