Fox, A. D. & Keller, V. (2020).
Gadwall Mareca strepera. In V. Keller, S. Herrando, P. Vorisek, M. Franch, M. Kipson, P. Milanesi, D. Marti, M. Anton, A. Klvanova, M. V. Kalyakin, B. H.-G. & R. P. B. Foppen (Eds.),
European Breeding Bird Atlas 2: Distribution, Abundance and Change (pp. 158-159). European Bird Census Council & Lynx Edicions.
Dekker, J., Berthinussen, A., Ransmayr, E., Bontadina, F., Marnell, F., Apoznanski, G., Matthews, J., Altringham, J., Ujvari, M., Phelan, S.-J., Roue, S., Kokurewicz, T., Hüttmeir, U., Loehr, V., Reiss-Enz, V., Fjederholt, E., Baggøe, H., Garin, I., Møller, J.
... Elmeros, M. (2016).
Future research needs for the mitigation of the effects of roads on bats.