Yu, Q.-Q. Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;
Xu, T., Hu, Q.-M., Hu, X.-W., & Yu, Q.-Q. (2011). Locking of Tearing Modes by the Error Field. Chinese Physics Letters, 28: 095202 (4pp). doi:10.1088/0256-307X/28/9/095202.