Lissotriton vulgaris (Smooth Newt). In: The IUCN Red List of Threatened Species 2009. IUCN Red List; 2009. e.T59481A11932252.
Pelophylax esculentus (Edible Frog). In: The IUCN Red List of Threatened Species 2009. IUCN Red List; 2009. e.T58594A11794484.
Triturus cristatus (Northern Crested Newt). In: The IUCN Red List of Threatened Species 2009. IUCN Red List; 2009. e.T22212A9365894.
Triturus dobrogicus (Danube Crested Newt). In: The IUCN Red List of Threatened Species 2009. IUCN Red List; 2009. e.T22216A9366668.