Some Existence Results for Vector Quasivariational Inequalities Involving Multifunctions and Applications to Traffic Equilibrium Problems. - Phan Quoc Khanh; Le Minh Luu (J. Glob. Optim., 2005)

Upper Semicontinuity of the Solution set to Parametric Vector Quasivariational Inequalities. - Phan Quoc Khanh; Le Minh Luu (J. Glob. Optim., 2005)

Uniqueness and Hölder continuity of the solution to multivalued equilibrium problems in metric spaces. - Lam Quoc Anh; Phan Quoc Khanh (J. Glob. Optim., 2007)

Various kinds of semicontinuity and the solution sets of parametric multivalued symmetric vector quasiequilibrium problems. - Lam Quoc Anh; Phan Quoc Khanh (J. Glob. Optim., 2008)

Sensitivity analysis for multivalued quasiequilibrium problems in metric spaces: Hölder continuity of solutions. - Lam Quoc Anh; Phan Quoc Khanh (J. Glob. Optim., 2008)

On the existence of solutions to quasivariational inclusion problems. - Nguyen Xuan Hai; Phan Quoc Khanh; Nguyen Hong Quan (J. Glob. Optim., 2009)

Continuity of solution maps of parametric quasiequilibrium problems. - Lam Quoc Anh; Phan Quoc Khanh (J. Glob. Optim., 2010)

Well-posedness without semicontinuity for parametric quasiequilibria and quasioptimization. - Lam Quoc Anh; Phan Quoc Khanh; Dang Thi My Van (Comput. Math. Appl., 2011)

Optimality conditions under relaxed quasiconvexity assumptions using star and adjusted subdifferentials. - Phan Quoc Khanh; Ho Thuc Quyen; Jen-Chih Yao (Eur. J. Oper. Res., 2011)

On generalized Ekeland's variational principle and equivalent formulations for set-valued mappings. - Phan Quoc Khanh; Dinh Ngoc Quy (J. Glob. Optim., 2011)

Continuous Selections, Collectively Fixed Points and Weak Knaster-Kuratowski-Mazurkiewicz Mappings in Optimization. - Phan Quoc Khanh; Vo Si Trong Long; Nguyen Hong Quan (J. Optim. Theory Appl., 2011)

Generic Stability and Essential Components of Generalized KKM Points and Applications. - Phan Quoc Khanh; Nguyen Hong Quan (J. Optim. Theory Appl., 2011)

Well-Posedness Under Relaxed Semicontinuity for Bilevel Equilibrium and Optimization Problems with Equilibrium Constraints. - Lam Quoc Anh; Phan Quoc Khanh; Dang Thi My Van (J. Optim. Theory Appl., 2012)

On Ekeland's Variational Principle for Pareto Minima of Set-Valued Mappings. - Phan Quoc Khanh; Dinh Ngoc Quy (J. Optim. Theory Appl., 2012)

Local Uniqueness of Solutions to Ky Fan Vector Inequalities using Approximations as Derivatives. - Phan Quoc Khanh; Le Thanh Tung (J. Optim. Theory Appl., 2012)

Higher-order optimality conditions in set-valued optimization using radial sets and radial derivatives. - Nguyen Le Hoang Anh; Phan Quoc Khanh (J. Glob. Optim., 2013)

Versions of Ekeland's variational principle involving set perturbations. - Phan Quoc Khanh; Dinh Ngoc Quy (J. Glob. Optim., 2013)

First and second-order optimality conditions using approximations for vector equilibrium problems with constraints. - Phan Quoc Khanh; Le Thanh Tung (J. Glob. Optim., 2013)

Variational Sets of Perturbation Maps and Applications to Sensitivity Analysis for Constrained Vector Optimization. - Nguyen Le Hoang Anh; Phan Quoc Khanh (J. Optim. Theory Appl., 2013)

Higher-order optimality conditions for proper efficiency in nonsmooth vector optimization using radial sets and radial derivatives. - Nguyen Le Hoang Anh; Phan Quoc Khanh (J. Glob. Optim., 2014)

Invariant-point theorems and existence of solutions to optimization-related problems. - Phan Quoc Khanh; Vo Si Trong Long (J. Glob. Optim., 2014)

On Higher-Order Sensitivity Analysis in Nonsmooth Vector Optimization. - H. T. H. Diem; Phan Quoc Khanh; Le Thanh Tung (J. Optim. Theory Appl., 2014)

On topological existence theorems and applications to optimization-related problems. - Phan Quoc Khanh; Lai-Jiu Lin 001; Vo Si Trong Long (Math. Methods Oper. Res., 2014)

Second-Order Optimality Conditions with the Envelope-Like Effect for Set-Valued Optimization. - Phan Quoc Khanh; Nguyen Minh Tung (J. Optim. Theory Appl., 2015)

An Induction Theorem and Nonlinear Regularity Models. - Phan Quoc Khanh; Alexander Y. Kruger; Nguyen Hieu Thao (SIAM J. Optim., 2015)

Second-Order Conditions for Open-Cone Minimizers and Firm Minimizers in Set-Valued Optimization Subject to Mixed Constraints. - Phan Quoc Khanh; Nguyen Minh Tung (J. Optim. Theory Appl., 2016)

Higher-Order Karush-Kuhn-Tucker Conditions in Nonsmooth Optimization. - Phan Quoc Khanh; Nguyen Minh Tung (SIAM J. Optim., 2018)

Variants of the Ekeland variational principle for approximate proper solutions of vector equilibrium problems. - Le Phuoc Hai; Lidia Huerga; Phan Quoc Khanh; Vicente Novo (J. Glob. Optim., 2019)

Continuity of approximate solution maps of primal and dual vector equilibrium problems. - Lam Quoc Anh; Phan Quoc Khanh; Tran Ngoc Tam (Optim. Lett., 2019)

Versions of the Weierstrass Theorem for Bifunctions and Solution Existence in Optimization. - Phan Quoc Khanh; Nguyen Hong Quan (SIAM J. Optim., 2019)

On the Mangasarian-Fromovitz constraint qualification and Karush-Kuhn-Tucker conditions in nonsmooth semi-infinite multiobjective programming. - Phan Quoc Khanh; Nguyen Minh Tung (Optim. Lett., 2020)

Quasi-contingent derivatives and studies of higher-orders in nonsmooth optimization. - Nguyen Xuan Duy Bao; Phan Quoc Khanh; Nguyen Minh Tung (J. Glob. Optim., 2022)

General Versions of the Ekeland Variational Principle: Ekeland Points and Stop and Go Dynamics. - Le Phuoc Hai; Phan Quoc Khanh; Antoine Soubeyran (J. Optim. Theory Appl., 2022)

Global Approximations of Vector Optimization Problems in Terms of Variational Convergence. - Huynh Thi Hong Diem; Phan Quoc Khanh (J. Optim. Theory Appl., 2024)

Second-Order Set-Valued Directional Derivatives of the Marginal Map in Parametric Vector Optimization Problems. - Nguyen Xuan Duy Bao; Phan Quoc Khanh; Nguyen Minh Tung (J. Optim. Theory Appl., 2025)