Hänfling, B., Bolton, P., Harley, M., & Carvalho, G. R. (2005). A molecular approach to detect hybridisation between crucian carp (Carassius carassius) and non-indigenous carp species (Carassius spp. and Cyprinus carpio). FRESHWATER BIOLOGY, 50(3), 403-417. doi:10.1111/j.1365-2427.2004.01330.x