@article{10_4064_fm168_2_3,
     author = {Krzysztof Ciesielski and Kandasamy Muthuvel and Andrzej Nowik},
     title = {On nowhere weakly symmetric functions and
functions with two-element range},
     journal = {Fundamenta Mathematicae},
     pages = {119--130},
     publisher = {mathdoc},
     volume = {168},
     number = {2},
     year = {2001},
     doi = {10.4064/fm168-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm168-2-3/}
}