1. 2 G. Bechly , 1999 : Phylogenetic Systematics of Odonata . Website im Internet, URL: http://members.tripod.de/GBechly/phylosys.htm [published on CD-rom by Schorr, M.; Lindeboom, M. (eds), Fundamentals of Odonatological Research], 2000.
2. 3 G. Bechly , 1999 : Phylogeny and systematics of fossil dragonflies (Insecta: Odonatoptera) with special reference to some Mesozoic outcrops . Dissertation. Tubingen: Eberhard-Karls-Universitat, 755 pp.
3. 4 H. B. Boudreaux , 1979 : Arthropod Phylogeny . New York, Chichester, Brisbane, Toronto: Wiley & Sons.