Olesti Vila, Oriol and Andreu Expósito, Ricard. 2016. A New Ancient Source about Roman Spain. The "Ars Gromatica Gisemundi" and the "Discriptio Hispaniae": Land Surveying Activities in Roman and Bizantine Period. Gerión. Revista de Historia Antigua 34, 351–381. DOI:https://doi.org/10.5209/rev_GERI.2016.v34.53747