1. The restoration of the Leaning Tower: geotechnical aspects;Burland;Workshop on the Restoration of the Leaning Tower of Pisa,1999
2. Development and application of a numerical model for the Leaning Tower of Pisa;Burland;IS Prefailure Deformation Characteristics of Geomaterials,1994
3. Leaning instability of tall structures;Cheney;J. Geotech. Engrg., Proc. ASCE,1991
4. Some remarks on the stability of Towers;Desideri,1994
5. La stabilità di torri su terreno deformabile;Desideri;RIG,1997