@inbook {880,
	title = {Queen recruitment in polygynous and polydomous Formica populations.},
	booktitle = {Teoksessa: Veeresh, G.K., Mallik, B. \& Viraktamath, C.A. (toim.), Social insects and the environment: 243-244. Oxford and IBH Publishing Co. New Delhi.},
	year = {1991},
	author = {Fortelius, W. and Fletcher, D.J.C. and Cherix, D.}
}
@article {859,
	title = {Attraction of sexes in Formica lugubris Zett. (Hymenoptera, Formicidae).},
	journal = {Insectes Sociaux},
	volume = {40},
	year = {1993},
	pages = {319-32},
	author = {Cherix, D. and Fletcher, D.J.C. and Chautems, D. and Fortelius, W. and Gris, G. and Keller, L. and Rosengren, R. and Vargo, E. L. and Walther, F.}
}
@article {858,
	title = {Alternative reproductive strategies in Formica lugubris Zett. (Hymenoptera, Formicidae). },
	journal = {Ethol. Ecol. Evol., Special Issue },
	volume = {1},
	year = {1991},
	pages = {61-66},
	author = {Cherix, D. and Chautems, D. and Fletcher, D.J.C. and Fortelius, W. and Gris, G. and Keller, L. and Passera, L. and Rosengren, R. and Vargo, E. L. and Walther, F.}
}
