@article{JCA_2010_17_2_JCA_2010_17_2_a15,
     author = {G. Fabbri and F. Gozzi and A. Swiech},
     title = {Verification {Theorem} and {Construction} of {\ensuremath{\varepsilon}-Optimal} {Controls} for {Control} of {Abstract} {Evolution} {Equations}},
     journal = {Journal of convex analysis},
     pages = {611--642},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2010},
     url = {http://geodesic.mathdoc.fr/item/JCA_2010_17_2_JCA_2010_17_2_a15/}
}