1. The “Optical Fiber Loop 21” Plan. Third Optoelectronics Conference (OEC '90) Technical Digest, 13C3-1, pp. 268–271 (July 1990).
2. Optical coupling between coated fibers in a compact fiber ribbon
3. , and . Proposal of flat-type bunch fiber and the crosstalk characteristics. National Convention Records of Japan, 1984, 2261.