Polak, Marinus. “The Pottery Finds from the Western Canabae Legionis at Nijmegen (NL): Some Methods for Spatial and Chronological Analysis”. Rei Cretariae Romanae Fautorum Acta, vol. 44, Jan. 2017, pp. 397-06, https://archaeopresspublishing.com/ojs/index.php/RCRF/article/view/2054.