Tsatsanifos, C., V. Kontogianni, and S. Stiros. “Tunneling and Other Engineering Works in Volcanic Environments: Sousaki and Thessaly”. Bulletin of the Geological Society of Greece 40, no. 4 (January 1, 2007): 1733–1740. Accessed April 3, 2025. https://ejournals.epublishing.ekt.gr/index.php/geosociety/article/view/17102.