Valkama, H., P. Martikainen, and M. Räty. “First Record of North American Ambrosia Beetle <i>Gnathotrichus materiarius</I> (Fitch) (Coleoptera, Scolytidae) in Finland - a New Potential Forest Pest?”. Entomologica Fennica, vol. 8, no. 4, Dec. 1997, pp. 193-5, doi:10.33338/ef.83943.