1. GOKAN, N. and K. MURAKAMI (1966) Daily rhythmic migration of the retinular and iris pigments in the compound eye of the soybean beetle, Anomala rufocuprea MOTSCHULSKY (Coleopt. Scarab.). J. Agr. Sci. Tokyo Nogyo Daigaku 11 : 149-154 (in Japanese with an English summary).
2. GOKAN, N. (1968) Postembryonic development of the compound eye in the velvety chafer, Maladera castanea. Jap. J. appl. Ent. Zool. 12 : 86-94 (in Japanese with an English summary).
3. GOKAN, N. (1973) The compound eye of the lamellicorn leaf-chafers and the relation between their structure and activities. Kontyu 41 : 106-125 (in Japanese with an English summary).
4. HORRIDGE, G. A. and C. GIDDINGS (1971) Movement on dark-light adaptation in beetle eyes of the neuropteran type. Proc. R. Soc. Lond. B. 179: 73-85.
5. KIRCHHOFFER, O. (1908) Untersuchungen fiber die Augen pentameren Kafer. Arch. Biontol. 2 : 237-287.