Blank & Taeger 1998. Comments on the taxonomy of Symphyta (Hymenoptera) (Preliminary studies for a catalogue of Symphyta, part 4). Taeger, Andreas; Blank, Stephan M.[Eds]. [The sawflies of Germany (Hymenoptera, Symphyta). Annotated census.], Goecke & Evers, Keltern., 1998: 1-364. Chapter pagination: 141-174