1. Alt W (1990) Parametric programming with applications to optimal control and sequential quadratic programming. Bayreuth Math Schr 34:1?37
2. Alt W (1990) Stability of Solutions and the Lagrange-Newton Method for Nonlinear Optimization and Optimal Control Problems. Habilitationsschrift, Universität Bayreuth
3. Clements DJ, Anderson BDO (1978) Singular Optimal Control: the Linear-Quadratic Problem. Lecture Notes in Control and Information Sciences, vol 5. Springer-Verlag, Berlin
4. Dontchev AL (1983) Perturbations, Approximations and Sensitivity Analysis of Optimal Control Systems. Lecture Notes in Control and Informations Sciences, vol 52. Springer-Verlag, Berlin
5. Hager WW (1979) Lipschitz continuity for constrained processes. SIAM J Control Optim 17:321?337