1. AKAI, H. (1965) Studies on the ultrastructure of the silk gland in the silkworm, Bombyx mori. Bull. Seric. Exp. Stn. 19: 375-484 (in Japanese with an English summary).
2. AKAI, H. (1973) Ultrastructure and function of the silk gland cells. The Cell 5 (4) : 2-17 (in Japanese).
3. AKAI, H. (1976) Ultrastructural Morphology of Insects. University of Tokyo Press, Tokyo, 290 pp. (in Japanese).
4. AKAI, H. (1983) The ultrastructure and functions of the silk glands of Bombyx mori. In Insect Ultra-structure II. (R. C. KING and H. AKAI, eds.), Plenum Press, New York, pp. 323-364.
5. AKAI, H. and S. SATO (1973) Ultrastructure of the larval hemocytes of the silkworm, Bombyx mori L. (Lepidoptera: Bombycidae). Mt. J. Insect Morphol. Embryol. 2: 207-231.