- Voolma, K., H. Ounap, and I. Suda. 1997b. Eesti urasklaste (Coleoptera, Scolytidae) maaraja [Estonian bark beetles (Coleoptera, Scolytidae) Eesti Pollumajandusulikool Metsandusteaduskond, Tartu., 43 pp. pp..
- Voolma, K. 1996. Puitu kahjustavate urasklaste (Trypodendron, Xyleborus) (Coleoptera: Scolytidae) esinemisest eestis [Distribution of xylomycetophagous scolytids (Trypodendron and Xyleborus) in Estonia]. Metsanduslikud Uurimused 27140-148.
- Voolma, K., H. Ounap, and I. Suda. 1997a. Bark beetles (Coleoptera: Scolytidae) of Estonia: Results of the examination of insect collections. Baltic Forestry 319-23.
- Voolma, K., H. Ounap, and I. Suda. 2000. Eesti putukate levikuaslas, kd 2, kaardid 98-165: Urasklased (Scolytidae) [Distribution maps of Estonian insects, vol 2, maps 98-165: Scolytidae]. Eesti Looduseuurijate Selts, Tartu.
- Voolma, K., H. Ounap, and I. Suda. 1996. Uraslased (Coleoptera, Scolytidae) eesti entomoloogilistes kollektsioonides [Bark beetles (Coleoptera, Scolytidae) in the insect collections of Estonia]. Metsanduslikud Uurimused 27125-132.
- Hansen, T. E., K. K. Voolma, A. D. Luik, and M. O. Viik. 1981. Osobennosti obmena veshchestv i kholodostoikost' koroeda Dendroctonus micans (Coleoptera, Scolytidae) [Metabolic patterns and coldresistance of Dendroctonus micans]) . Zoologischeskii Zhurnal 60:1003-1009.
- Luik, A., and K. Voolma. 1980. Hibernation of the European spruce beetle (Dendroctonus micans Kug) [In Estonian] . Metsanduslikud Uurimused, Estonian SSR 16:52-64.
- Roigas, P., and K. Voolma. 1977. Hiidurask [European spruce beetle] [In Estonian] . Eesti Lodus 20:240-244.
- Voolma, K. K. 1978. Rasprostranenie i vredonosnost' bol'shogo elovogo luboeda. Lesnoe Khoziaistvo 31(4):90-91 [English translation: Canada Department of the Environment No. OOENF-1690].
- Voolma, K. K. 1980a. Biometric characteristics of different developmental phases of the European spruce beetle (Dendroctonus micans Kug) [In Russian, German summary] . Metsanduslikud Uurimused, Estonian SSR 16:65-72.
- Voolma, K. K. 1980b. Distribution and ecology of the European spruce beetle Dendroctonus micans Kug. (Col., Scolytidae) in Estonia [In Russian, English summary]. Metsanduslikud Uurimused, Estonian SSR 16:44-51.
- Voolma, K. K. 1986. Entomophages of Dendroctonus micans in Estonia [In Russian, English summary] . Metsanduslikud uurimused, Estonian SSR 21:89-97.
- Luik, A., and K. Voolma. 1990. Hibernation peculiarities and cold-hardiness of the great spruce bark beetle, Dendroctonus micans Kug . Eesti Teaduste Akadeemia Toimetised, Bioloogia 39:214-218.
- Voolma, K. 1994. The occurrence of the great European spruce bark beetle, Dendroctonus micans Kug. (Coleoptera, Scolytidae), as a pest of Scots pine, Pinus sylvestris L. Metsanduslikud Uurimused 26:113-124.
- Voolma, K., and A. Luik. 1999. Dendroctonus micans (Kug.) as a pest of Scots pine, Pinus sylvestris L. Pages 246-247 In B. Forster, M. Knízek, and W. Grodzki (eds.), Methodology of forest insect and disease survey in Central Europe. Proceedings of the Second Workshop of the IUFRO Working Party 7.03.10, April 20-23, 1999, Sion-Châteauneuf, Switzerland. Swiss Federal Institute for Forest, Snow and Landscape Research, Birmensdorf, Switzerland.
- Voolma, K., and M. Mandelshtam. 1998. A comparison of the checklists of Scolytidae (Coleoptera) in two adjacent regions: Estonia and St. Petersburg district of Russia. Pages 336-337 In Book of Abstracts 1, Proceedings of the 6th European Congress of Entomology, 23-29 August 1998, eské Budjovice, Czech Republic. 423 pp.
- Voolma, K., and H. Õunap. 1994. Additions to the list of bark beetles (Coleoptera, Scolytidae) in Estonia . Metsanduslikud Uurimused 26:110-112.
- Voolma, K., and I. Süda. 1999. Rare species of Cerambycidae and Scolytidae (Coleoptera) in Estonia. Pages 187-192 In K.J. Elberg, (ed.), Proceedings of the XXIV Nordic Congress of Entomology, August 8-11, 1997, Tartu, Estonia. University of Tartu, Tartu, Estonia.
- Voolma, K., I. Süda, and H. Õunap. 1998. New records of bark beetles (Coleoptera, Scolytidae) from Estonia . Proceedings of the Estonian Academy of Sciences, Biology, Ecology 47:73-78.