Murray, A., Boltz, E., Fortunko, C. M., Mecklenburg, Marion F., and Green, Robert E. 1992. "
Air-coupled Ultrasonic System for Nondestructive Evaluation of Wooden Panel Paintings." in
3rd International Conference on Nondestructive Testing, Microanalytical Methods and Environment Evaluation for Study and Conservation of Works of Art, edited by Marabelli, M. and Santopadre, P., 441–450. Brescia, Italy: Italian Society for Nondestructive Testing.