@article {1389,
	title = {A competition hierarchy among boreal ants: Impact on resource partitioning and community structure. },
	journal = {Oikos},
	volume = {51},
	year = {1988},
	pages = {135-15},
	author = {Savolainen, R. and Veps{\"a}l{\"a}inen, K.}
}
@article {1213,
	title = {Causal reasoning in modelling multiway contingency tables},
	journal = {Oikos},
	volume = {53},
	year = {1988},
	pages = {281-285},
	author = {Veps{\"a}l{\"a}inen, K. and Savolainen, R. and Penttinen, A.}
}
