@book {62,
	title = {Faue de France - Echinodermes},
	series = {Faune de France},
	volume = {1},
	year = {1921},
	pages = {1-210},
	publisher = {Libraire de la Faculte des Sciences},
	organization = {Libraire de la Faculte des Sciences},
	address = {Paris},
	author = {Koehler, R.}
}
@article {63,
	title = {Ophiurans of the Philippine Seas and adjacent waters},
	journal = {Smithsonian Institution United States National Museum Bulletin},
	volume = {100},
	number = {5},
	year = {1922},
	pages = {1{\textendash}486},
	publisher = {Smithsonian Institution},
	address = {Washington, DC},
	author = {Koehler, R.}
}
@inbook {61,
	title = {Echinoderma I. Asteroidea, Ophiuroidea et Echinoidea},
	booktitle = {Beitr{\"a}ge zur Kenntnis der Meeresfauna Westafrikas},
	volume = {1},
	year = {1914},
	pages = {127-303},
	publisher = {L. Friederichsen \& Co.},
	organization = {L. Friederichsen \& Co.},
	address = {Hamburg},
	author = {Koehler, R.},
	editor = {Michaelsen, E.}
}
@article {60,
	title = {Asteries, Ophiures et Echinides},
	journal = {Reports on the scientific investigations of the British Antarctic Expedition 1907-9},
	volume = {2},
	number = {4},
	year = {1911},
	pages = {25-66, pls 4-8},
	author = {Koehler, R.}
}
@article {59,
	title = {Ophiures littorales},
	journal = {Siboga Expeditie Monographs},
	volume = {45b},
	year = {1905},
	pages = {1{\textendash}140, pls. 1{\textendash}18},
	publisher = {E.J. Brill},
	address = {Leiden},
	author = {Koehler, R.}
}
