Nuehrenberg, J. Relativistic Plasmas, Max Planck Institute for Plasma Physics, Max Planck Society;
Nuehrenberg, J., Vaclavik, J., Zille, R., & et al. (1989). On the Transition from Quasi-helical to Helical Symmetry. In Theory of Fusion Plasmas (pp. 3-10). Ed. Compositori.