@article{SIGMA_2013_9_a33,
     author = {Jeanne N. Clelland and Christopher G. Moseley and George R. Wilkens},
     title = {Geometry of {Optimal} {Control} for {Control-Affine} {Systems}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2013},
     volume = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a33/}
}