@article{ZAA_1999__18_2_50181,
     author = {Wanka, G. and Krallert, U.},
     title = {Duality for optimal control-approximation problems with gauges.},
     journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
     pages = {491--504},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {1999},
     zbl = {1016.90076},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ZAA_1999__18_2_50181/}
}