@article{TM_2010_268_a4,
     author = {R. W. Brockett},
     title = {On the control of a~flock by a~leader},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {56--63},
     publisher = {mathdoc},
     volume = {268},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TM_2010_268_a4/}
}