Global Volcanism Program. Department of Mineral Sciences. National Museum of Natural History. Smithsonian Institution: Wolf – General Information. 2016. [dostęp 2016-09-10]. (ang.).
Global Volcanism Program. Department of Mineral Sciences. National Museum of Natural History. Smithsonian Institution: Wolf – Synonyms & Subfeatures. 2016. [dostęp 2016-09-10]. (ang.).
Global Volcanism Program. Department of Mineral Sciences. National Museum of Natural History. Smithsonian Institution: Wolf – Eruptive History. 2016. [dostęp 2016-09-10]. (ang.).