@article {42210,
	title = {Simplifying the phytohaemagglutinin skin-testing technique in studies of avian immunocompetence},
	volume = {13},
	year = {1999},
	pages = {567-572},
	publisher = {Functional Ecology},
	keywords = {tree swallows, Zebra finches},
	url = {http://www.jstor.org/stable/pdfplus/2656565.pdf},
	author = {Smits, J. E. and Bortolotti, G. R. and Tella, J. L.}
}
