@article {2306,
	title = {Willow tree shoot module length and the attack and survival pattern of a shoot-galling sawfly, Euura atra (Hymenoptera: Tenthredinidae).},
	journal = {Entomologica Fennica},
	volume = {8},
	year = {1997},
	pages = {113-119},
	author = {Price, P. W. and Roininen, H. and Tahvanainen, J.}
}
@article {1627,
	title = {Bottom-up and top-down influences in the trophic system of a willow , a calling sawfly, parasitoids and inquilines. },
	journal = {Oikos},
	volume = {77},
	year = {1996},
	pages = {44-50},
	author = {Roininen, H. and Price, P. W. and Tahvanainen, J.}
}
