A quasi-optical input for a whispering-gallery-mode gyro-twystronS. Filchenkov, I. Gachev, M. Goikhman, Yu. Guznov, D. Lukovnikov and A. TsvetkovEPJ Web Conf., 149 (2017) 04033DOI: https://doi.org/10.1051/epjconf/201714904033