- Riegler, M., C. Stauffer, and M. v. Meer. 1998. No further signs of Wolbachia in European Ips species? Page 342 In Book of Abstracts 1, Proceedings of the 6th European Congress of Entomology, 23-29 August 1998, eské Budjovice, Czech Republic. 423 pp.
- Stauffer, C., M. v. Meer, and M. Riegler. 1997. The presence of Wolbachia in European Ips typographus (Col, Scolytidae) populations and the consequences for genetic data . Mitteilungen der Deutschen Gesellschaft für allgemeine und angewandte Entomologie 11:709-711.