1. H. Murata, S. Inao and Y. Matsuda: Step index type optical fiber cable, 1st.　ECOC(September,1975), pp.70-72.

2. H. Murata, S. Inao, Y. Matsuda and T. Kuraha: Optimum design for optical fiber used in optical cable system, 4th ECOC(September, 1978), pp.242-248.

3. H. Murata and N. Inagaki: Low loss single-mode fiber development and splicing research in Japan, Journ. QE, QE-17,6,(June, 1981), pp835-849.