Savolainen, E., Drotz, M., Hoffsten, P.-O. and Saura, A. 2007. The <i>Baetis vernus</i> group (Ephemeroptera: Baetidae) of northernmost Europe: an evidently diverse but poorly understood group of mayflies. Entomologica Fennica. 18, 3 (Sep. 2007), 160–167. DOI:https://doi.org/10.33338/ef.84393.