@article{MOMA_1990__109_2_178453,
     author = {N.S. Papageorgiou and E.P. Avgerinos},
     title = {On the {Sensivity} and {Relaxability} of {Optimal} {Control} {Problems} {Governed} by {Nonlinear} {Evolution} {Equations} with {State} {Constraints.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {1--24},
     publisher = {mathdoc},
     volume = {109},
     number = {2},
     year = {1990},
     zbl = {0712.49025},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1990__109_2_178453/}
}