Poledník, L., Rehulka, J., Kranz, A., Poledníková, K., Hlavác, V. & Kazihnitková, H. (2007). Physiological responses of over-wintering common carp (Cyprinus carpio) to disturbance by Eurasian otter (Lutra lutra). Fish Phyiol Biochem, 34(3), pp. 233-34.