@article{IM2_1985_25_1_a8,
     author = {D. B. Silin},
     title = {Riemann integrability of an optimal control in linear time-optimal problems},
     journal = {Izvestiya. Mathematics },
     pages = {183--192},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1985_25_1_a8/}
}