PIOTRZKOWSKA, Hanna, Jerzy LITNIEWSKI, Elżbieta SZYMAŃSKA, and Andrzej NOWICKI. “Ultrasonic Echosignal Applied to Human Skin Lesions Characterization”.
Archives of Acoustics 37, no. 1 (October 20, 2013): 103–108. Accessed May 4, 2025.
https://acoustics3.ippt.pan.pl/index.php/aa/article/view/133.