@article {1387,
	title = {Facultative and obligate slavery in formicine ants: frequency of slavery and proportion of slaves. },
	journal = {Biol. J. Linnean Soc.},
	volume = {57},
	year = {1996},
	pages = {47-58},
	author = {Savolainen, R. and Deslippe, R. J.}
}
@article {1069,
	title = {Evolution of nesting strategies of ants: genetic evidence from different population types of Formica ants},
	journal = {Biol. J. Linnean Soc.},
	volume = {21},
	year = {1984},
	pages = {331-348.},
	author = {Pamilo, P. and Rosengren, R.}
}
@article {913,
	title = {Evolution of species-specific hydrocarbon patterns in Formica ants.},
	journal = {Biol. J. Linnean Soc.},
	volume = {95},
	year = {2008},
	pages = {131-140},
	author = {Martin, S. J. and Helanter{\"a}, H. and Drijfhout, F.P}
}
