Murray, A., Boltz, E. S., Renken, M. C., Fortunko, C. M., Mecklenburg, Marion F., and Green, R. E. 1994. "
Air-coupled Ultrasonic System for Detecting Delaminations and Cracks in Paintings on Wooden Panels." in
Nondestructive Characterization of Materials VI, edited by Green, Robert E., Rudd, C. O., and Kozaczek, Krzysztof J., 103–110. New York: Plenum Press.
https://doi.org/10.1007/978-1-4615-2574-5_14