@article {916,
	title = {Time and energy constraints during incubation in free-living swallows (<i>Hirundo rustica</i>): an experimental study using precision electronic balances},
	journal = {Journal of Animal Ecology},
	volume = {56},
	year = {1987},
	note = {Hirundinidae},
	pages = {229-245},
	keywords = {yesnest},
	author = {Jones, G.}
}
