@article{MABA_1988_2_2_a4,
     author = {Vladimir Veliov},
     title = {On the {Controllability} of {Control} {Constrained} {Linear} {Systems}},
     journal = {Mathematica balkanica},
     pages = {147},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/MABA_1988_2_2_a4/}
}