Karamanlidis, A. A., Dendrinos, P., Fernandez de Larrinoa, P., Kıraç, C. O., Nicolaou, H. & Pires, R: Monachus monachusIUCN Red List of Threatened Species. Version 2023-1. 2023. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 12.12.2023. (englanniksi)
