@article{JCA_2003_10_2_JCA_2003_10_2_a3,
     author = {J. C. Bellido and P. Pedregal},
     title = {Existence in {Optimal} {Control} with {State} {Equation} in {Divergence} {Form} via {Variational} {Principles}},
     journal = {Journal of convex analysis},
     pages = {365--378},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/JCA_2003_10_2_JCA_2003_10_2_a3/}
}