Pinkert, S., Bechly, G. and Nel, A. 2017.

First record of hawker dragonflies from Eocene Baltic amber (Odonata: Anisoptera: Gomphaeschnidae)

. Zootaxa. 4272, 2 (May 2017), 263–275. DOI:https://doi.org/10.11646/zootaxa.4272.2.7.