(la) Nova Acta Acad. Caes. Leop. Carol. 10 p.70 BHL.
hbw.com
(en) Collar, N., Kirwan, G.M. & Boesman, P., 2019. Green-thighed Parrot (Pionites leucogaster). In: del Hoyo, J. et al. Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/54710 on 6 March 2019)