A virtual museum of crinoids from all over the world
Siegel (2017): Crinoiden Rüdersdorf; Der Steinkern - Heft 28
Hildner (2016): Chelocrinus schlotheimi; Der Steinkern - Heft 27
Szulc, Matysik & Hagdorn (2015): The mid-Triassic-Muschelkalk in Southern Poland (download)
Hagdorn (2011): Triassic Crucial Period Crinoid Diversification (download)
Arp, Hoffmann, Seppelt & Riegel (2004): Exkursion Pal. Ges. Goettingen (download)
Hagdorn (1991): Muschelkalk - Schöntaler Symposium
Muschelkalkmuseum Ingelfingen
Hagdorn (1999): Triassic Muschelkalk of Central Europe (download)
Hagdorn, Wang & Wang (2007): Palaeoecology of the pseudoplanktonic Triassic crinoid Traumatocrinus from Southwest China