1. Das System der Metazoa II;Ax,1999
2. Phylogenetic utility of the internal transcribed spacers of nuclear ribosomal DNA in plants: an example from the Compositae;Baldwin;Mol. Phylogenet. Evol.,1992
3. Monograph of the Oxytrichidae (Ciliophora, Hypotrichia);Berger;Monogr. Biol.,1999
4. Redefinition of Holosticha Wrzesniowski, 1877 (Ciliophora, Hypotricha);Berger;Eur. J. Protistol.,2003
5. Uroleptopsis Kahl, 1932 (Ciliophora, Hypotricha): morphology and cell division of type species, redefinition, and phylogenetic relationships;Berger;Acta Protozool.,2004