Hume, R. & Bonan, A. (2017). Thick-knees (Burhinidae). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/52241 on 12 March 2017)
Hume, R., Kirwan, G.M. & Boesman, P. (2017). Beach Thick-knee (Esacus magnirostris). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/53774 on 12 March 2017).
Hume, R. & Kirwan, G.M. (2017). Great Thick-knee (Esacus recurvirostris). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/53773 on 12 March 2017).