@article{KYB_1983__19_6_a5,
     author = {\v{S}t\v{e}p\'an, Jarom{\'\i}r},
     title = {Nonlinear approximation in control problems},
     journal = {Kybernetika},
     pages = {491--504},
     publisher = {mathdoc},
     volume = {19},
     number = {6},
     year = {1983},
     mrnumber = {734835},
     zbl = {0529.93022},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1983__19_6_a5/}
}