Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Schlyter, F., G. Birgersson, J. Byers, and A. Bakke. 1992. The aggregation pheromone of Ips duplicates and its role in competitive interactions with I. typographus (Coleoptera: Scolytidae). Chemoecology 3:103-112.
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