Funded by the National Science Foundation PEET program (Partnerships for Enhancing Expertise in Taxonomy)
Pjatnitskii, G. K. 1930c. Material zum Studium der Borkenkafer der Fichtenwalder des Distrikts Poshekhonje [On the recognition of bark beetles in fir of the Poshekhonye region] Bouvernement von Jaroslavl [In Russian] . Zashchita Rastenii 6:595-629.