@article{CC_2007_36_3_a20,
     author = {Zaj{\'\i}\v{c}ek, Lud\v{e}k},
     title = {A {C1} function which is nowhere strongly paraconvex and nowhere semiconcave},
     journal = {Control and Cybernetics},
     pages = {803--810},
     publisher = {mathdoc},
     volume = {36},
     number = {3},
     year = {2007},
     zbl = {1173.26309},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CC_2007_36_3_a20/}
}