Lortz, D. Theory, Max Planck Institute for Plasma Physics, Max Planck Society;
Rebhan, E. Theory, Max Planck Institute for Plasma Physics, Max Planck Society;
IPP_6_188.pdf (Any fulltext), 5MB
Lortz, D., & Rebhan, E.(1979). Eigenvalue Bounds for Hill's Equation (IPP 6/188). Garching: Max-Planck-Institut für Plasmaphysik.