1. & The complementary use of on site non-destructive tests for the investigation of historic masonry structures. Proceedings of the 9th North American Masonry Conference, Clemson, South Carolina, 2003: 978-989.
2. & An investigation into methods of nondestructive evaluation of masonry structures. National Technical Information Service Report PB 82218074. National Science Foundation 1982.
3. Aerojet General Corporation. Investigation of sonic testing of masonry walls. Final Report to the Department of General Services, Office of Architecture and Construction, State of California, 1967.
4. & Sonic investigation of shear failed reinforced brick Masonry. Masonry Industry November 1989.