D. W.  Langor and Raske, A. G., ?Mortality factors and life tables of the eastern larch beetle, Dendroctonus simplex (Coleoptera: Scolytidae), in Newfoundland.?, Environmental Entomology, vol. 17(6), pp. 959-963, 1988.

D. W.  Langor, ?Arthropods and nematodes co-occurring with the eastern larch beetle, Dendroctonus simplex (Col.: Scolytidae), in Newfoundland.?, Entomophaga, vol. 36(2), pp. 303-313, 1991.

C. X.  Hu, Li, C. D., Wang, Z. Y., Langor, D. W., Yue, S. K., Liu, K. Y., and Han, S. I., ?Study on the parasitoids of Pissodes nitidus Roel.?, Journal of Forestry Research, vol. 11(3), pp. 213-214, 2000.