==Eksterne henvisninger==
* Archive.org backup: [https://web.archive.org/web/20080223123458/www2.privatei.com/~bartjean/chap9.htm Gloria Farley: "In Plain Sight". Chapter 9. The Oklahoma Runestones]
* [http://www.econ.ohio-state.edu/jhm/arch/outliers.html  Some Archaeological Outliers: Adventures in Underground Archaeology] {{Webarchive|url=https://web.archive.org/web/20050204003401/http://econ.ohio-state.edu/jhm/arch/outliers.html |date= 4. februar 2005 }}
* Archive.org backup: [https://web.archive.org/web/19991122064621/http://admin.hps.osrhe.edu/hps/htmls/runtest.htm Webarchive backup (uden billeder): The Heavener Runestone]
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