Stolowsky, Alfred (1957). "Dempwolff, Otto". Neue Deutsche Biographie. 3: 592.
handle.net
hdl.handle.net
Blust, Robert (2013). The Austronesian Languages (edisi ke-revised). Australian National University. hdl:1885/10191. ISBN978-1-922185-07-5. P. 528–543.