1. J.P. Jones, “Impediography: A New Ultrasonic Technique for Nondestructive Testing and Medical Diagnosis,” Proc. First Int. Conf. Ultrasonics, London, England, March 1973.
2. J.P. Jones, “A Study of Ultrasonic Techniques for the Diagnosis of Cerebral Disorders, Phase I: A Preliminary Investigation of Impediography,” Contract No. N01-NS-3-2319, The National Institute of Neurological Diseases and Stroke/The Indianapolis Center for Advanced Research, October 1974.