RICHTER, K. P., P. LANGE, R. MILLNER, H. HEYNEMANN, M. I. RICHTER, H. PRESSLER, Th. DRESCHER, and H. LETTERER. “Measurement System for Medical Ultrasonic Pulse Spectroscopy”. Archives of Acoustics 9, no. 1-2 (June 30, 1984): 137–142. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/3206.