1. The Hamilton-Jacobi Theory in the Calculus of Variations;Rund,1966
2. Nonlocal Variations and Local Invariance of Fields;Edelen,1969
3. Calculus of Variations;Gelfand,1963
4. Isovector Methods for Equations of Balance with Programs for Computer Assistance in Operator Calculations and an Exposition of Practical Topics of the Exterior Calculus;Edelen,1980
5. The force on an elastic singularity