Variational and Extremum Principles in Macroscopic Systems (English Edition)

Self-dual Partial Differential Systems and Their Variational Principles (Springer Monographs in Mathematics) (English Edition)

Energy Principles and Variational Methods in Applied Mechanics (English Edition)

Harmonic Vector Fields: Variational Principles and Differential Geometry (English Edition)

Variational Principles in Classical Mechanics: Revised Second Edition (English Edition)