Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Kangas, E., V. Perttunen, H. Oksanen, and M. Rinne. 1967. Laboratory experiments on the olfactory orientation of Blastophagus piniperda L. (Coleoptera, Scolytidae) to substances isolated from pine rind. Acta Entomologici Fennici 22:1-87.