Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Valkama, H., P. Martikainen, and M. Räty. 1997. First record of North American ambrosia beetle Gnathotrichus materiarius (Fitch) (Coleoptera, Scolytidae) in Finland — a new potential forest pest? . Entomologica Fennica 8:193-195.