@unpublished{eprints1466,
            year = {2009},
       booktitle = {7th Panhellenic Conference on Chemical Engineering},
           title = {Formulation and solution of an optimal control problem where the input values are restricted on a finite set},
          author = {Pantelis Sopasakis and Haralambos Sarimveis},
           month = {June},
             url = {http://eprints.imtlucca.it/1466/}
}