@inbook{Ophiuroidea:SourceID:42999, author = {Koehler, R.}, journal = {In: Weber, Siboga Expeditie. M. E.J. Brill, Leiden}, pages = {1-176}, title = {Ophiures de l'expédition du Siboga. Part 1. Ophiures de mer profonde}, url = {https://www.biodiversitylibrary.org/page/12079779}, year = {1904} }