Reaching high sensitivity of radio-acoustic spectroscopy using “strong microwaves”M.A. Koshelev, I.N. Vilkov, A.I. Tsvetkov, M.Yu. Glyavin and M.Yu. TretyakovEPJ Web Conf., 149 (2017) 02028DOI: https://doi.org/10.1051/epjconf/201714902028