@article{WoRMS:SourceID:139303, author = {Müller, J. and Troschel, F. H.}, journal = {Vieweg: Braunschweig}, title = {System der Asteriden.1. Asteriae. 2. Ophiuridae}, url = {http://www.biodiversitylibrary.org/item/44159}, year = {1842} }