Schwenn, U. Experimental Plasma Physics 2 (E2), Max Planck Institute for Plasma Physics, Max Planck Society;
Fu, G. Y., Cooper, W. A., Gruber, R., Schwenn, U., & Anderson, D. V. (1992). Fully three‐dimensional ideal magnetohydrodynamic stability analysis of low‐n modes and Mercier modes in stellarators. Physics of Fluids B - Plasma Physics, 4(6), 1401-1411. doi:10.1063/1.860100.