Stec, Bronisław, Andrzej Dobrowolski, and Waldemar Susek. “Multifrequency Microwave Thermograph for Biomedical Applications”. Journal of Telecommunications and Information Technology 15, no. 1 (March 30, 2004): 117–122. Accessed August 26, 2026. https://www.jtit.pl/jtit/article/view/221.