Kraus, M. Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society; Numerical Methods in Plasma Physics (NMPP), Max Planck Institute for Plasma Physics, Max Planck Society;
https://mediatum.ub.tum.de/?id=1140308 (Supplementary material)
https://mediatum.ub.tum.de/doc/1140308/1140308.pdf (Any fulltext)
Kraus, M. (2013). Variational integrators in plasma physics. PhD Thesis, Technische Universität, München.