Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Kangas, E., V. Perttunen, and H. Oksanen. 1970. Responses of Blastophagus minor Hart. (Col., Scolytidae) to the pine phloem fraction known to be attractant to Blastophagus piniperda L. Annales Entomologici Fennici 36(2):120-122.