- Purrini, K., and Z. Zizka. 1983. More on the life cycle of Malamoeba scolyti (Amoebidae: Sarcomastigophora) parasitizing the bark beetle Dryocoetes autographus (Scolytidae, Coleoptera) . Journal of Invertebrate Pathology 42:96-105.
- Weiser, J., R. Wegensteiner, and Z. Zizka. 1995. Canningia spinidentis gen. et sp. n. (Protista: Microspora, a new pathogen of the fir bark beetle, Pityokteines spinidens. Folia Parasitologica 42:1-10.
- Weiser, J., R. Wegensteiner, and Z. Zizka. 1997. Ultrastructure of Nosema typographi