M. John Roobol, Alan L. Smith. Volcanology of Saba and St. Eustatius, Northern Lesser Antilles: Present day geothermal and seismic activity on Saba and St. Eustatius, the status of activity of the volcanoes, and possible future precursor activities. Amsterdam: Koninklijke Nederlandse Akademie van Wetenschappen, 2004. Dostupné v archivu pořízeném dne 2017-11-07. ISBN90-6984-384-6. (anglicky)Archivováno 7. 11. 2017 na Wayback Machine.