1. Non-equilibrium Thermodynamics, Variational Techniques, and Stability;Segal,1966
2. Topics in Stability and Bifurcation Theory;Sattinger,1973
3. Branching of Solutions of Nonlinear Equations
4. Topological Methods in the Theory of Nonlinear Integral Equations;Krasnoselskii,1963
5. Bifurcation Theory and Nonlinear Eigenvalue Problems,1969