Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Lutyk, P. 1984. Zery cetynca wiekszego (Tomicus-Myelophilus piniperda L) w pedach swierka i jodly [Feeding of Tomicus piniperda and shoots of Norway spruce and silver fir] . Sylwan 128:65-68.