Hartmann, D. W7-X: Design and Configuration (DC), Max Planck Institute for Plasma Physics, Max Planck Society;
Moiseenko, V. E., Berezhnyj, V. L., Bondarenko, V. N., Burchenko, P. Y., Castejon, F., Chechkin, V. V., et al. (2011). RF plasma production and heating below ion-cyclotron frequencies in Uragan torsatrons. Nuclear Fusion, 51: 083036 (8pp). doi:10.1088/0029-5515/51/8/083036.