^Introduction to Planetary Science: The Geological Perspective. Gunter Faure, Teresa M. Mensing. Springer, 2007. page 118 (页面存档备份,存于互联网档案馆)
^Tektites in the geological record: showers of glass from the sky. Gerald Joseph Home McCall. Geological Society of London, 2001. page 10 (页面存档备份,存于互联网档案馆)