Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Schlyter, F., O. Anderbrant, S. Harding, and H. P. Ravn. 1984. Offspring per emergence hole at different attack densities in the spruce bark beetle, Ips typographus (L) (Coleoptera, Scolytidae) . Zeitschrift fur Angewandte Entomologie 97:244-248.