@article {277,
	title = {Ethics and amphibians},
	journal = {Nature},
	volume = {431},
	year = {2004},
	month = {23 SEPT 2004},
	pages = {403},
	keywords = {toe clipping},
	url = {file://localhost/Users/breda/Desktop/Documents/Literature/M/May\%202004.pdf},
	author = {May, R.M.}
}
