@article{CMUC_2014__55_4_a7,
     author = {Pokorn\'y, Du\v{s}an},
     title = {Nonconvex {Lipschitz} function in plane which is locally convex outside a discontinuum},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {509--521},
     publisher = {mathdoc},
     volume = {55},
     number = {4},
     year = {2014},
     mrnumber = {3269013},
     zbl = {06391559},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_2014__55_4_a7/}
}