Lozovoi, D. I., and I. V. Tropin. 1967. Koroedy-vrediteli vostochnoi eli [The protection of forests from pests and diseases. Barkbeetles: the pests of Picea orientalis]. Zashchita lesnyh nasazdenij ot vreditelej i boleznej. Lesnoe Khoziaistvo, Moscow 1965: 2-36. [Canada Department of Forestry, Translation No. 145. 54 p.].