Optimal Shape Design Problems for a Class of Systems Described by Parabolic Hemivariational Inequality. - Leszek Gasinski (J. Glob. Optim., 1998)

On the Existence of Positive Solutions for Hemivariational Inequalities Driven by the p-Laplacian. - Michael Filippakis; Leszek Gasinski; Nikolaos S. Papageorgiou (J. Glob. Optim., 2005)

Nontrivial Solutions for Resonant Hemivariational Inequalities. - Zdzislaw Denkowski; Leszek Gasinski; Nikolaos S. Papageorgiou (J. Glob. Optim., 2006)

Multiplicity theorems for scalar periodic problems at resonance with p-Laplacian-like operator. - Leszek Gasinski (J. Glob. Optim., 2007)

Nontrivial solutions for Neumann problems with an indefinite linear part. - Leszek Gasinski; Nikolaos S. Papageorgiou (Appl. Math. Comput., 2010)

A pair of positive solutions for the Dirichlet p(z)-Laplacian with concave and convex nonlinearities. - Leszek Gasinski; Nikolaos S. Papageorgiou (J. Glob. Optim., 2013)

Hemivariational Inequality Approach to Evolutionary Constrained Problems on Star-Shaped Sets. - Leszek Gasinski; Zhenhai Liu; Stanislaw Migórski; Anna Ochal; Zijia Peng (J. Optim. Theory Appl., 2015)

Optimal control for doubly nonlinear evolutionary inclusions. - Leszek Gasinski; Stanislaw Migórski; Anna Ochal; Zijia Peng (Appl. Math. Comput., 2018)

Nonlinear Dirichlet problems with sign changing drift coefficient. - Leszek Gasinski; Nikolaos S. Papageorgiou (Appl. Math. Lett., 2019)

Multiplicity of positive solutions for an equation with degenerate nonlocal diffusion. - Leszek Gasinski; João R. Santos Júnior (Comput. Math. Appl., 2019)

Eigenvalue problems and their perturbations for the weighted (p, q)-Laplacian. - Leszek Gasinski; Nikolaos S. Papageorgiou (Commun. Nonlinear Sci. Numer. Simul., 2021)

A Multiplicity Theorem for Superlinear Double Phase Problems. - Beata Deregowska; Leszek Gasinski; Nikolaos S. Papageorgiou (Symmetry, 2021)

Nonlinear Eigenvalue Problems for the Dirichlet (p, 2)-Laplacian. - Yunru Bai; Leszek Gasinski; Nikolaos S. Papageorgiou (Axioms, 2022)

Existence and Nonexistence of Positive Solutions for Perturbations of the Anisotropic Eigenvalue Problem. - Olena Andrusenko; Leszek Gasinski; Nikolaos S. Papageorgiou (Symmetry, 2023)

Anisotropic and isotropic implicit obstacle problems with nonlocal terms and multivalued boundary conditions. - Shengda Zeng; Leszek Gasinski; Vicentiu D. Radulescu; Patrick Winkert (Commun. Nonlinear Sci. Numer. Simul., 2023)

Positive solutions for singular problems with multivalued convection. - Yunru Bai; Leszek Gasinski; Nikolaos S. Papageorgiou (Commun. Nonlinear Sci. Numer. Simul., 2024)

Anisotropic (p, q) Equation with Partially Concave Terms. - Leszek Gasinski; Gregoris Makrides; Nikolaos S. Papageorgiou (Symmetry, 2024)

Singular double phase equations with a sign changing reaction. - Yunru Bai; Leszek Gasinski; Nikolaos S. Papageorgiou (Commun. Nonlinear Sci. Numer. Simul., 2025)