@article {1075,
	title = {Diploid males and colony-level selection in Formica ants},
	journal = {Ethology, Ecology and Evolution},
	volume = {6},
	year = {1994},
	pages = {221-235},
	author = {Pamilo, P. and Sundstr{\"o}m, L. and Fortelius, W. and Rosengren, R.}
}
