Second-order characterizations of C1-smooth robustly quasiconvex functions. - Pham Duy Khanh; Vo Thanh Phat (Oper. Res. Lett., 2018)

Second-order characterizations of quasiconvexity and pseudoconvexity for differentiable functions with Lipschitzian derivatives. - Pham Duy Khanh; Vo Thanh Phat (Optim. Lett., 2020)

A Generalized Newton Method for Subgradient Systems. - Pham Duy Khanh; Boris S. Mordukhovich; Vo Thanh Phat (Math. Oper. Res., 2023)

Generalized damped Newton algorithms in nonsmooth optimization via second-order subdifferentials. - Pham Duy Khanh; Boris S. Mordukhovich; Vo Thanh Phat; Dat Ba Tran (J. Glob. Optim., 2023)

Variational Convexity of Functions and Variational Sufficiency in Optimization. - Pham Duy Khanh; Boris S. Mordukhovich; Vo Thanh Phat (SIAM J. Optim., 2023)

Variational and Strong Variational Convexity in Infinite-Dimensional Variational Analysis. - Pham Duy Khanh; V. V. H. Khoa; Boris S. Mordukhovich; Vo Thanh Phat (SIAM J. Optim., 2024)

Globally convergent coderivative-based generalized Newton methods in nonsmooth optimization. - Pham Duy Khanh; Boris S. Mordukhovich; Vo Thanh Phat; Dat Ba Tran (Math. Program., 2024)

Second-Order Subdifferential Optimality Conditions in Nonsmooth Optimization. - Pham Duy Khanh; V. V. H. Khoa; Boris S. Mordukhovich; Vo Thanh Phat (SIAM J. Optim., 2025)

Inexact proximal methods for weakly convex functions. - Pham Duy Khanh; Boris S. Mordukhovich; Vo Thanh Phat; Dat Ba Tran (J. Glob. Optim., 2025)