@article{CC_2003_32_3_a8,
     author = {Maurer, H. and Osmolovskii, N.P.},
     title = {Second order conditions for bang-bang control problems},
     journal = {Control and Cybernetics},
     pages = {555--584},
     year = {2003},
     volume = {32},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2003_32_3_a8/}
}