1. Barla, G., 2002. Tunnelling under squeezing rock conditions. In: Kolymbas, D. (Ed.), Advances in Geotechnical Engineering and Tunnelling, vol. 5, pp. 169-268.
2. Barla, G., 2009. Innovative tunnelling construction method to cope with squeezing at Saint Martin La Porte access adit (Lyon-Torino Base tunnel). In: Rock Engineering in Difficult Conditions in Soft Rocks and Karst. Proceedings of Eurock. ISRM Regional Symposium, Dubrovnik, Croatia.
3. Barla, G., Barla, M., Bonini, M., Debernardi, D., 2007. Lessons learned during the excavation of the Saint Martin La Porte access gallery along the Lyon-Turin Base tunnel. In: Schneider, John, Brandner (Eds.), BBT 2007, Internationales Symposium Brenner Basistunnel uns Zulaufstrecken. Innsbruck University Press.
4. The interaction between yielding supports and squeezing ground;Cantieni;Tunnelling and Underground Space Technology,2009
5. Big tunnels in bad rock. 2000 Terzaghi lecture;Hoek;ASCE Journal of Geotechnical and Geoenvironmental Engineering,2001