@article {1161,
	title = {Sex ratio evolution in a variable environment.},
	journal = {Nature (London)},
	volume = {289 No. 5793},
	year = {1981},
	pages = {27-3},
	author = {Charnov, E.L. and Los den Hartogh, R.L. and Jones, W.T. and van den Assem, J.}
}
