Camiz, Sergio, Elena Rova, and Vanda Tulli. “Exploratory Analysis of Images Engraved on Ancient Near-Eastern Seals Based on a Distance Among Strings”. Statistica 58, no. 4 (January 1, 1998): 669–689. Accessed October 17, 2021. https://rivista-statistica.unibo.it/article/view/1114.