1. Abe, T., 1990. Evolution of worker caste in termites. Proceedings of the 11th International Congress of the International Union for the Study of Social Insects, Bangalore, pp. 29?30.
2. Abe, T., 1991. Ecological factors associated with the evolution of worker and soldier castes in termites.Ann. Entomol. 9:101?107.
3. Alexander, B., 1986. Eusociality and parasitism in the Aculeate Hymenoptera. Proceedings of the 10th International Congress of the International Union for the Study of Social Insects, Munchen, p. 126.
4. Alexander, R. D., 1974. The evolution of social behavior.Annu. Rev. Ecol. Syst. 5:325?383.
5. Alexander, R. D., K. M. Noonan and B. J. Crespi, 1991. The evolution of eusociality. In:The Biology of the Naked Mole Rat (P. W. Sherman, J. U. M. Jarvis and R. D. Alexander, Eds.), Princeton University Press, Princeton, New Jersey, pp. 3?44.