@article {Poulin:1 June 1999:0020-7519:903,
	author = "Poulin R.",
	title = "The functional importance of parasites in animal communities: many roles at many levels?",
	journal = "International Journal for Parasitology",
	volume = "29",
	year = "1 June 1999",
	abstract = "",
	pages = "903-914(12)",
	url = "http://www.ingentaconnect.com/content/els/00207519/1999/00000029/00000006/art00045"
	doi = "doi:10.1016/S0020-7519(99)00045-4"
}