1. ENEL, Italian National Power Agency, ISMES S.p. A., “The Problem of Dam Aging: ENEL Experiences,” 17th Congress on Large Dams, Vienna, 1991.
2. Schuller, M.P., Berra, M., Fatticcioni, A., Atkinson, R.H., and Binda, L., “Use of Tomography for Diagnosis and Control of Masonry Repairs”, Proceedings, 10th Int. Brick/Block Masonry Conf., Calgary, Alberta, Canada, July 1994.
3. Atkinson, R.H. and Schuller, M.P., “Development and Application of Acoustic Tomography to Masonry,” 7th Expert Meeting NATO CCMS Pilot Study-Conservation of Historic Brick Structures, Venice, Italy, Nov. 1993.
4. Caratin, H., Personal correspondence, April, 1994.