@article{AULFM_1984_01_a9,
     author = {Ko\'ska, Marian},
     title = {On some extremum problem in the family of non-decreasing functions},
     journal = {Acta Universitatis Lodziensis. Folia Mathematica},
     publisher = {mathdoc},
     volume = {01},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AULFM_1984_01_a9/}
}