Reference
N. Miljkovi, H. Hilgers, Harald Ahnelt, H. Pohl (2005): Phenotypic diversity in the threespine stickleback Gasterosteus aculeatus LINNAEUS 1758 (Teleostei: Gasterosteidae) in western Austria - the four-spined form. – Annalen des Naturhistorischen Museums in Wien – 107B: 25 - 38.