Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Pfeffer, A. 1942c. Prispevek ku poznani rozsireni nekterych lykozroutu v Cechach a na Morave [On the distribution of several species of Ips in Bohemia and Moravia] . Lesnicka Prace 21:447-462.