Integrated Taxonomic Information System (ITIS): Otus elegans (TSN 555377)itis.gov. Viitattu 26.12.2011. (englanniksi)
iucnredlist.org
BirdLife International: Otus elegansIUCN Red List of Threatened Species. Version 2019.1. 2017. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 17.7.2019. (englanniksi)