Tursi, Antonio. “Nine Thesis About Universals According to the Policraticus and the Metalogicon of John of Salisbury”. Patristica et Mediævalia 320 (June 6, 2011): 38-50. Accessed July 9, 2025. http://revistascientificas.filo.uba.ar/index.php/petm/article/view/7782.