Ramírez, P. B., De Balbín Behrmann, R., Laporte, L., Gouézin, P., Cousseau, F., Bermejo, R. B., Gismero, A. H., Cela, M. I., & Quesnel, L. (2015). Natural and artificial colours: The megalithic monuments of Brittany. Antiquity, 88(343), 55-71. https://doi.org/10.15184/AQY.2014.29