How many queens are there in established green ant, Oecophylla smaragdina, colonies?

Peng, R., Christian, K.A. & Gibb, K.S., 1997. How many queens are there in established green ant, Oecophylla smaragdina, colonies?. In 28th Annual General Meeting and Scientific Conferenceof the Australian Entomological Society. 28th Annual General Meeting and Scientific Conferenceof the Australian Entomological Society. 10/1997. Melbourne, pp. 65 - 65. Available at: http://espace.cdu.edu.au/view/cdu:871.