Reference
Harald Lobitzer, Gyöngyi Lelkes-Felvari, Franz Ottner, Marcela Svobodova, Harald Lobitzer (2010): Grindstone Mining in Gosau - the Classical Locality of the Ressen Formation (Lower Campanian, Gosau, Upper Austria) – Abhandlungen der Geologischen Bundesanstalt in Wien – 65: 169 - 179.