1. Calculus of Variations.;Gelfand,1963
2. Variational Methods for the Study of Nonlinear Operators.;Vainberg,1964
3. The Method of Weighted Residuals and Variational Principles.;Finlyson,1972
4. “On a Generalized Evolution Criterion in Macroscopic Physics,”;Glansdorff;Physica,1964
5. “Variational Properties and Fluctuation Theory,”;Glandsdorff;Physica,1965