High precision frequency stabilization of a 263 GHz continuous wave gyrotronG.G. Denisov, A.P. Fokin, M.Yu. Glyavin, G.Yu. Golubiatnikov, L.V. Lubyako, M.V. Morozkin, B.Z. Movschevich and A.I. TsvetkovEPJ Web Conf., 149 (2017) 04022DOI: https://doi.org/10.1051/epjconf/201714904022