@article{IM2_1999_63_3_a7,
     author = {A. G. Chentsov},
     title = {Well-posed extensions of unstable control problems with integral constraints},
     journal = {Izvestiya. Mathematics},
     pages = {599--630},
     year = {1999},
     volume = {63},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1999_63_3_a7/}
}