Jobling, J.A. (2019). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "Lewinia". Handbook of the Birds of the World Alive: Key to Scientific Names in Ornithology. Lynx Edicions. Retrieved 8 July 2019.
Jobling, J.A. (2019). del Hoyo, J.; Elliott, A.; Sargatal, J.; Christie, D.A.; de Juana, E. (eds.). "lewinii". Handbook of the Birds of the World Alive: Key to Scientific Names in Ornithology. Lynx Edicions. Retrieved 8 July 2019.
