@article {890,
	title = {Genetic differentiation in sympatric wood ants Formica rufa and Formica polyctena.},
	journal = {Insectes Sociaux},
	volume = {51},
	year = {2004},
	pages = {139-145},
	author = {Gyllenstrand, N. and Sepp{\"a}, P. and Pamilo, P.}
}
