Taxon - Links and literature
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 11.1 [http://www.worldbirdnames.org/] [as Nisaetus cirrhatus vanheurni (Junge, 1936)]Data retrieved on: 22 April 2021
Clements, J. F.: eBird/Clements checklist of birds of the world 6.7, Cornell Lab of Ornithology [as Nisaetus cirrhatus vanheurni]Data retrieved on: 9 April 2013