Source: https://www.researchgate.net/profile/Pierre-Moret/publication/32221056_A_propos_du_Castellet_de_Banyoles_et_de_Philon_de_Byzance_une_necessaire_palinodie/links/00b7d530e60564e6eb000000/A-propos-du-Castellet-de-Banyoles-et-de-Philon-de-Byzance-une-necessaire-palinodie.pdf