Thiébaux, Aurélie, Marc Feller, Bruno Duchêne, and Eric Goemaere. “Roman Whetstone Production in Northern Gaul (Belgium and Northern France)”. Journal of Lithic Studies 3, no. 3 (October 31, 2016): 565-587. Accessed April 20, 2019. http://journals.ed.ac.uk/lithicstudies/article/view/1672.