@article{SM_1987_58_1_a1,
     author = {A. A. Agrachev and A. V. Sarychev},
     title = {On reduction of a smooth system linear in the control},
     journal = {Sbornik. Mathematics},
     pages = {15--30},
     publisher = {mathdoc},
     volume = {58},
     number = {1},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1987_58_1_a1/}
}