1. Akçakaya HR, Mills G, Doncaster CP (2007) The role of metapopulations in conservation. In: Macdonald D, Service K (eds) Key topics in conservation biology. Wiley-Blackwell, pp 64–84
2. Bănăduc D (2008) Umbra krameri Walbaum, 1792 a Natura 2000 protected fish species, in Romania. Acta Ichtiologica Romanica 3:33–44
3. Bănăduc D, Marić S, Cianfaglione K, Afanasyev S, Somogyi D, Nyeste K, Antal L, Koščo J, Ćaleta M, Wanzenböck J (2022) Stepping stone wetlands, last sanctuaries for European mudminnow: how can the human impact, climate change, and non-native species drive a fish to the edge of extinction. Sustainability 14(20):13493. https://doi.org/10.3390/su142013493
4. Bănărescu PM, Bănăduc D (2007) Habitats directive (92/ 43/EEC) fish species (Osteichthyes) on the Romanian territory. Acta Ichtiologica Romanica 2:43–78
5. Bănărescu PM, Oţel V, Wilhelm A (1995) The present status of Umbra krameri Walbaum in Romania. Ann Naturhist Mus Wien 97 B:496–501