International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground & Viggiani, G. e. (201). Geotechnical aspects of underground construction in soft ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema.
Chicago-čujuhus (17. p.)International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground juo Giulia editor Viggiani. Geotechnical Aspects of Underground Construction in Soft Ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema, 201.
MLA-čujuhus (9. p.)International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground juo Giulia editor Viggiani. Geotechnical Aspects of Underground Construction in Soft Ground: Proceedings of the 7th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Roma, Italy, 17-19 May, 2011. Leiden, Netherlands : CRC Press/Balkema, 201.