Züchner, T. & Boesman, P.: Black-crested Coquette (Lophornis helenae). [w:] del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (red.). Handbook of the Birds of the World Alive [on-line]. Lynx Edicions, Barcelona, 2020. [zarchiwizowane z tego adresu (2020-05-10)].
Züchner, T. & Boesman, P.: Black-crested Coquette (Lophornis helenae). [w:] del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (red.). Handbook of the Birds of the World Alive [on-line]. Lynx Edicions, Barcelona, 2020. [zarchiwizowane z tego adresu (2020-05-10)].
itis.gov
Lophornis helenae, [w:] Integrated Taxonomic Information System(ang.).
iucnredlist.org
apiv3.iucnredlist.org
Lophornis helenae, [w:] The IUCN Red List of Threatened Species(ang.).
