Asio — разлика између измена

* Mlíkovský, Jirí (2002): ''Cenozoic Birds of the World, Part 1: Europe''. Ninox Press, Prague. <small>{{Listed Invalid ISBN|80-901105-3-8}}</small> [https://wwwweb.webcitationarchive.org/5wzfLX4u8?url=web/20110520101755/http://www.nm.cz/download/JML-18-2002-CBE.pdf PDF fulltext]<!-- This should be treated with extreme caution as regards merging of species. Splits are usually good though. See also critical review in Auk121:623-627 here http://www.findarticles.com/p/articles/mi_qa3793/is_200404/ai_n9396879 -->