STEPANENKO, P. RESONATORS OF MECHANICALLY TUNABLE WAVEGUIDE FILTERS FOR TROPOSPHERIC COMMUNICATION. Information and Telecommunication Sciences, [S. l.], n. 1, p. 39–50, 2013. DOI: 10.20535/2411-2976.12013.39-50. Disponível em: https://infotelesc.kpi.ua/article/view/30225. Acesso em: 10 oct. 2025.