Taxon - Links and literature
Gill F., Donsker D. & Rasmussen P. (eds): IOC World Bird List 3.3 [http://www.worldbirdnames.org/] [as Glaucidium griseiceps occultum Moore, RT, 1947]Data retrieved on: 25 April 2013
Clements, J. F.: eBird/Clements checklist of birds of the world 6.7, Cornell Lab of Ornithology [as Glaucidium griseiceps occultum]Data retrieved on: 25 April 2013