1. Akimoto, S. (1989) Gall-invading behavior ofEriosoma aphids (Homoptera: Pemphigidae) and its significance.Jpn. J. Ent.,57: 210–220.
2. Aoki, S. (1978) Two pemphigids with first instar larvae attacking predatory intruders (Homoptera, Aphidoidea).New Entomol, Nagano,27: 7–12.
3. Aoki, S. (1982) Soldiers and altruistic dispersal in aphids. 154–158. In M. D. Breed, C. D. Michener and H. E. Evans (eds)The Biology of Social Insects. Westview Press, Boulder.
4. Aoki, S. (1987) Evolution of sterile soldiers in aphids. 53–65. In Y. Itô, J. L. Brown and J. Kikkawa (eds)Animal Societies: Theories and Facts. Japan Scientific Societies Press, Tokyo.
5. Aoki, S. and U. Kurosu (1986) Soldiers of a European gall aphid,Pemphigus spyrothecae (Homoptera: Aphidoidea): why do they molt.J. Ethol. 4: 97–104.