On the "bang-bang" principle for nonlinear evolution inclusions. N.S. Papageorgiou — 1993 Aequationes mathematicae
On the Sensivity and Relaxability of Optimal Control Problems Governed by Nonlinear Evolution Equations with State Constraints. N.S. Papageorgiou; E.P. Avgerinos — 1990 Monatshefte für Mathematik
On Nonlinear Parametric Problems for p-Laplacian-Like Operators. N.S. Papageorgiou; E.M. Rocha — 2009 RACSAM
On the structure of the solution set of evolution inclusions with time-dependent subdifferentials. Papageorgiou, N.S.; Papalini, F. — 1996 Acta Mathematica Universitatis Comenianae. New Series