@article{AUCMP_1993__34_2_a14,
     author = {Natkaniec, T.},
     title = {On sums of {Darboux} functions},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {107--111},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1993},
     mrnumber = {1282973},
     zbl = {0802.26003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_1993__34_2_a14/}
}