Bregnballe, T., Amstrup, O., Holm, T.E., Clausen, P. och Fox, A.D. 2014. Skjern River Valley, Northern Europe’s most expensive wetland restoration project: benefits to breeding waterbirds. Ornis Fennica. 91, 4 (dec. 2014), 231–243. DOI:https://doi.org/10.51812/of.133860.