1. and , ‘Evolution of optical path layer techniques toward photonic networks’, Proc. 1992 IEICE Fall Conference, Tokyo, Japan, 27-30 September 1992, SB-7-1.
2. and , ‘Optical path layer technologies to enhance B-ISDN performance’, Proc. ICC'93, Geneva, Switzerland, 23-26 May 1993, pp. 1300–1307.
3. ITU-T Recommendation G. 803, ‘Architectures of transport networks based on the synchronous digital hierarchy (SDH)’, 1992.
4. ITU-T Recommendation I 311, ‘B-ISDN general network aspects’, 1992.