Gurchenko, A. D., Gusakov, E. Z., Altukhov, A. B., Selyunin, E. P., Esipov, L. A., Kantor, M. Y., et al. (2013). Spatial structure of the geodesic acoustic mode in the FT-2 tokamak by upper hybrid resonance Doppler backscattering. Plasma Physics and Controlled Fusion, 55: 085017 (11pp). doi:10.1088/0741-3335/55/8/085017.