Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Roepke, W. 1940. De rijpingsvreterij van den ooftboom- spintkever, Scolytus mali Bechst (Col: Scolytidae) [The maturation feeding of Scolytus mali] . Tijdschrift over Plantenziekten 46:168-174.