Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Annila, E., B. Langstrom, M. Varama, R. Hiukka, and P. Niemela. 1999. Susceptibility of defoliated Scots pine to spontaneous and induced attack by Tomicus piniperda and Tomicus minor . Silva Fennica 33:93-106.
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