@unpublished{eprints1226,
           title = {Gradient tracking based second order sliding mode control
of a wheeled vehicle},
       booktitle = {European Control Conference 2007},
            year = {2007},
          author = {Antonella Ferrara and Matteo Rubagotti},
           month = {July},
             url = {http://eprints.imtlucca.it/1226/}
}