Kryzhanovskyi, V.G., S.P. Serhiienko, D.V. Chernov, and V.V. Kryzhanovsky. “Listening to NFC at Higher Harmonic Frequencies”. Radiotekhnika 1, no. 204 (April 9, 2021): 99–104. Accessed April 8, 2025. http://rt.nure.ua/article/view/238574.