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Title: Nonsmooth Analysis and Control Theory, Author: Francis H. Clarke
Title: Nonsmooth Analysis and Geometric Methods in Deterministic Optimal Control, Author: Boris S. Mordukhovich
Title: Nonsmooth Optimization and Related Topics, Author: F.H. Clarke
Title: Nonsmooth/Nonconvex Mechanics: Modeling, Analysis and Numerical Methods, Author: David Yang Gao
Title: Optimal Control, Stabilization and Nonsmooth Analysis, Author: Marcio S. de Queiroz
Title: Optimization and Control with Applications, Author: Liqun Qi