@article{CC_2006_35_4_a6,
     author = {Gouveia, Paulo D.F. and Torres, Delfim F.M. and Rocha, Eug\'enio A.M.},
     title = {Symbolic computation of variational symmetries in optimal control},
     journal = {Control and Cybernetics},
     pages = {831--849},
     publisher = {mathdoc},
     volume = {35},
     number = {4},
     year = {2006},
     zbl = {1133.49029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2006_35_4_a6/}
}