BirdLife International: Serinus serinusIUCN Red List of Threatened Species. Version 2013.2. 2012. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 31.1.2014. (englanniksi)
European Serin, Serinus serinusThe IUCN Red List of Threatened Species. Version 2023-1. 2017. International Union for Conservation of Nature and Natural Resources. βIn Europe, the breeding population is estimated to number 20,900,000-31,500,000 pairs, which equates to 41,900,000-63,000,000 mature individuals (BirdLife International 2015). Europe forms c.90% of the global range, so a very preliminary estimate of the global population size is 46,500,000-70,000,000 mature individuals, although further validation of this estimate is needed.β Viitattu 9.4.2024. (englanniksi)