@article{TIMM_2005_11_1_a16,
     author = {A. A. Tolstonogov},
     title = {The bang-bang principle for controlled systems of subdifferential type},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {189--200},
     year = {2005},
     volume = {11},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2005_11_1_a16/}
}