Allegre C. F. (1948) Contributions to the life history of a gregarine parasitic in grasshoppers. Trans. Am. Microsc. Soc. 67: 211–226

Baier P., Pennerstorfer J., Schopf A. (2007) PHENIPS – A comprehensive phenology model of Ips typographus (L.) (Col., Scolytinae) as a tool for hazard rating of bark beetle infestation. Forest Ecol. Manag. 249: 171–186

Bjørnson S. (2008) Natural enemies of the convergent lady beetle, Hippodamia convergens Guérin-Méneville: Their inadvertent importation and potential significance for augmentative biological control. Biol. Control 44: 305–311

Christiansen E., Bakke A. (1988) The spruce bark beetle of Eurasia. In: Dynamics of forest insect populations, (Ed. A. A. Berryman). Plenum Publishing Corporation, New York and London, 479–503

Christiansen E. (2008) Eurasian spruce bark beetle, Ips typographus Linnaeus (Coleoptera: Curculionidae, Scolytinae). In: Encyclopedia of Entomology 2 (Ed. J. L. Capinera). Springer, Dordrecht, 1363–1366

Clopton R. E., Gold R. E. (1995) Effects of pH on excystation of Gregarina cuneata and Gregarina polymorpha (Eugregarina: Gregarinidae). J. Eukaryot. Microbiol. 42: 540–544

Clopton R. E., Gold R. E. (1996) Host specificity of Gregarina blattarum von Siebold, 1839 (Apicomplexa: Eugregarinida) among five species of domiciliary cockroaches. J. Invertebr. Pathol. 67: 219–223

Corbel J. C. (1968) La spécificité parasitaire des Grégarines d’Orthoptères. Ann. Parasitol. Hum. Comp. 43: 25–32

Culek M. (1996) Biogeografické členění České republiky. Enigma, Praha

Forsse E. (1991) Flight propensity and diapause incidence in 5 populations of the bark beetle Ips typographus in Scandinavia. Entomol. Exp. Appl. 61: 53–57

Händel U., Wegensteiner R., Weiser J., Žižka Z. (2003) Occurrence of pathogens in associated living bark beetles (Col., Scolytinae) from different spruce stands in Austria. J. Pest Sci. 76: 22–32

Holuša J., Weiser J., Žižka Z. (2009) Pathogens of the spruce bark beetles Ips typographus and Ips duplicatus. Cent. Eur. J. Biol. 4: 567–573

Kereselidze M., Wegensteiner R., Goginashvili N., Tvaradze M., Pilarska D. (2010) Further studies on the occurrence of natural enemies of Ips typographus (Coleoptera: Curculionidae: Scolytinae) in Georgia. Acta Zool. Bulg. 62: 131–139

MacDougall M. M. (1942) A study of temperature effects on gregarines of Tenebrio molitor larvae. J. Parasitol. 28: 233–240

Netherer S., Pennerstorfer J., Baier P., Fuhrer E., Schopf A. (2003) Monitoring and risk assessment of the spruce bark beetle, Ips typographus. In: Proceedings: Ecology, Survey and Management of Forest Insects, 2002 September 1–5; Krakow, Poland. Gen. Tech. Rep. NE-311 (Eds. M. L. McManus, A. M. Liebhold). Newtown Square, PA: U.S. Dept. of Agriculture, Forest Service, Northeastern Research Station, 75–79

Omoto C. K., Toso M., Tang K., Sibley L. D. (2004) Expressed sequence tag (EST) analysis of Gregarine gametocyst development. Int. J. Parasitol. 34: 1265–1271

Smith A. J., Cook T. J., Lutterschmidt W. I. (2007) Effects of temperature on the development of Gregarina cubensis (Apicomplexa: Eugregarinida) parasitizing Blaberus discoidalis (Blattaria: Blaberidae). J. Parasitol. 93: 583–588

Takov D., Doychev D., Wegensteiner R., Pilarska D. (2007) Study on the pathogens of bark beetles (Coleoptera, Curculionidae, Scolytinae) from different coniferous stands in Bulgaria. Acta Zool. Bulg. 59: 87–96

Takov D., Pilarska D., Wegensteiner R. (2010) List of protozoan and microsporidian pathogens of economically important bark beetle species (Coleoptera: Curculionidae: Scolytinae) in Europe. Acta Zoolog. Bulg. 62: 201–209

Valigurová A., Michalková V., Koudela B. (2009) Eugregarine trophozoite detachment from the host epithelium via epimerite retraction: Fiction or fact? Int. J. Parasitol. 39: 1235–1242

Wegensteiner R., Weiser J. (1996) Occurrence of Chytridiopsis typographi (Microspora, Chytridiopsida) in Ips typographus L. (Col., Scolytinae) field population and in a laboratory stock. J. Appl. Entomol. 120: 595–602

Wegensteiner R., Weiser J., Führer E. (1996) Observations on the occurrence of pathogens in the bark beetle Ips typographus L. (Col., Scolytinae). J. Appl. Entomol. 120: 190–204

Wegensteiner R. (2004) Pathogens in bark beetles. In: Bark and wood boring insects in living trees in Europe, A synthesis, (Eds. F. Lieutier, K. R. Day, A. Battisti, J. C. Grégoire, H. F. Evans). Kluwer, Dordrecht, 291–313

Wegensteiner R., Weiser J. (2004) Annual variation of pathogen occurrence and pathogen prevalence in Ips typographus L. (Col., Scolytinae) from the BOKU University Forest Demonstration Centre. J. Pest Sci. 77: 221–228

Wegensteiner R., Dedryver C. A., Pierre J. S. (2010) The comparative prevalence and demographic impact of two pathogens in swarming Ips typographus adults: a quantitative analysis of long term trapping data. Agric. Forest. Entomol. 12: 49–57

Wermelinger B. (2004) Ecology and management of the spruce bark beetle Ips typographus – a review of recent research. Forest Ecol. Manag. 202: 67–82

Yaman M. (2007) Gregarina typographi Fuchs, a gregarine pathogen of the six-toothed pine bark beetle, Ips sexdentatus (Boerner) (Coleoptera: Curculionidae, Scolytinae) in Turkey. Turk. J. Zool. 31: 359–363

Yaman M. (2008) On the occurrence of a gregarine parasite from Psylloides cupreus Koch 1803 (Coleoptera: Chrysomelidae) of Turkey. North-West. J. Zool. 4: 167–172

Zuk M. (1987) The effects of gregarine parasites, body size, and time of day on spermatophore production and sexual selection in field crickets. Behav. Ecol. Sociobiol. 21: 65–72