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3. S. Robinson, “Stability Theory for Systems of Inequalities, Part II: Differentiable Nonlinear Systems,” SIAM J. Numer. Anal. 13, 497–513 (1976).
4. J. F. Bonnans and A. Shapiro, Perturbation Analysis of Optimization Problems (Springer, New York, 2000).
5. E. R. Avakov, “Theorems on Estimates in a Neighborhood of a Singular Point of a Mapping,” Mat. Zametki 47(5), 3–13 (1990).