@article{10_4064_fm_59_2_189_201,
     author = {Tadeusz \'Swi\k{a}tkowski},
     title = {On the conditions of monotonicity of functions},
     journal = {Fundamenta Mathematicae},
     pages = {189--201},
     publisher = {mathdoc},
     volume = {59},
     number = {2},
     year = {1966},
     doi = {10.4064/fm-59-2-189-201},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-59-2-189-201/}
}