1. D.K. Hsu and T.C. Patton, “Development of Ultrasonic Inspection for AdhesiveBonds in Aging Aircraft”, Materials Evaluation, Vol. 51, (12), Dec. 1993, pp 1390–1397.
2. T.C. Patton, “Low Frequency Ultrasonic Nondestructive Inspection of Aluminum/ Adhesive Fuselage Lap Splices”, Masters Thesis, Iowa State University, 1993.
3. T.C. Patton and D.K. Hsu, “Doing Focused Immersion Ultrasonics Without the Water Mess”, Review of Progress in QNDE, Vol. 13A, eds by D.O. Thompson and D.E. Chimenti, (Plenum Press, New York, 1994), pp 701–708.
4. Ultrasonic Inspection System by SONIX, Inc., Springfield, VA.
5. J.H. Gieske, “Evaluation of Scanners for C-scan Imaging in Nondestructive Inspection of Aircraft”, Sandia National Laboratories Report, Alberquerque, NM. 1993.