Murray, A., Fortunko, C. M., Mecklenburg, Marion F., and Green, R. E. 1993. "
Detection of Delaminations in Art Objects Using Air-Coupled Ultrasound." in
Materials Issues in Art and Archaeology III, edited by Vandiver, Pamela B., Druzik, James R., Wheeler, G. S., and Freestone, Ian., 371–377. Pittsburgh, Pennsylvania: Materials Research Society.
https://doi.org/10.1557/PROC-267-371