Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Malphettes, C., and F. Saintonge. 1995. A propos du piegeage du typographe dans les pessieres de basse altitude [Ips typographus trapping in low altitude Norway spruce stands]. Bulletin Technique, Office National des Forets 30:55-64.