Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Nuorteva, M. K. 1955b. Kirjanpainaja (Ips typographus L) kuusirajan pohjoispuolelta [The bark beetle, Ips typographus found beyond the northern range of the spruce] . Annales Entomologici Fennici 21:195-196.