@inbook {Morand2000_340,
	title = {Nematode parasite species richness and the evolution of spleen size in birds},
	booktitle = {Canadian Journal of Zoology},
	volume = {78},
	year = {2000},
	pages = {1356{\textendash}1360},
	author = {Morand, Serge and Poulin, Robert}
}
@inbook {Poulin1997_408,
	title = {Population abundance and sex ratio in dioecious helminth parasites},
	booktitle = {Oecologia (Berlin)},
	volume = {111},
	year = {1997},
	pages = {375{\textendash}380},
	author = {Poulin, Robert}
}
