Cummings, Vicki; Richards, Colin (2014). "The essence of the dolmen: the Architecture of megalithic construction". Préhistoires Méditerranéennes (En ligne). Colloque – 2014 Functions, uses and representations of space in the monumental graves of Neolithic Europe. Association pour la promotion de la préhistoire et de l'anthropologie méditerranéennes (published 29 October 2014). ISSN1167-492X. Retrieved 22 May 2015. (text is in English)
Hunter, Robert (1907). "Appendix A" . The Preservation of Places of Interest or Beauty. Manchester University Press – via Wikisource.
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Cummings, Vicki; Richards, Colin (2014). "The essence of the dolmen: the Architecture of megalithic construction". Préhistoires Méditerranéennes (En ligne). Colloque – 2014 Functions, uses and representations of space in the monumental graves of Neolithic Europe. Association pour la promotion de la préhistoire et de l'anthropologie méditerranéennes (published 29 October 2014). ISSN1167-492X. Retrieved 22 May 2015. (text is in English)