books.google.com - A historical and theoretical survey of variational principles and their relationship to dynamics and quantum theory. Topics include Hamilton's principle, Hamilton-Jacobi equation, relationship to quantum theory and wave mechanics, and principles of Feynman and Schwinger. For professional physicists,...http://books.google.com/books/about/Variational_Principles_in_Dynamics_and_Q.html?id=OwTyrJJXZbYC&utm_source=gb-gplus-shareVariational Principles in Dynamics and Quantum Theory