@article{TM_1985_169_a9,
     author = {R. V. Gamkrelidze},
     title = {Sliding modes in optimal control theory},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {180--193},
     year = {1985},
     volume = {169},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1985_169_a9/}
}