Odderskær, P., Kristensen, P. (Ed.) & Hansen, H. O. (Ed.) (1994). Mammals: Eurasian otter. In EEA Environmental Monographs (pp. 100-101). European Environment Agency.
Odderskær, P., Kristensen, P. (Ed.) & Hansen, H. O. (Ed.) (1994). Birds: Osprey. In EEA Environmental Monographs (pp. 98-99). European Environment Agency.