Archiv für Naturgeschichte (Nicolai, 1900)

Archiv für Naturgeschichte (Nicolai, 1900)

International catalogue of scientific literature - Royal Society (Great Britain) (Published for the International Council by the Royal Society of London, 1905)

The Siphonophorae / by Henry B. Bigelow - Bigelow, Henry B. (Henry Bryant), 1879 -1967 (Printed for the Museum, 1911)

The Zoological record - Zoological Society of London. (J.V. Voorst, 1902)

Zoologisches Centralblatt (W. Engelmann, 1902)