@article{10_21136_CMJ_1976_101428,
     author = {Mi\v{s}{\'\i}k, Ladislav},
     title = {\"Uber approximative derivierte {Zahlen} monotoner {Funktionen}},
     journal = {Czechoslovak Mathematical Journal},
     pages = {579--583},
     publisher = {mathdoc},
     volume = {26},
     number = {4},
     year = {1976},
     doi = {10.21136/CMJ.1976.101428},
     mrnumber = {0432834},
     zbl = {0344.26004},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1976.101428/}
}