@Book{Zittel1882,
author  = "Zittel, Karl Alfred von",
title   = "Ueber Plicatocrinus",
year    = "1882",
address = "München",
series  = "Sitzungsberichte",
volume  = "1882,4",
url     = "https://publikationen.badw.de/en/003394678",
}