@article{10_4064_fm_140_1_87_97,
     author = {Jan Mal\'y and Lud\v{e}k Zaj{\i}́\v{c}ek},
     title = {Approximate differentiation: {Jarn{\'\i}k} points},
     journal = {Fundamenta Mathematicae},
     pages = {87--97},
     publisher = {mathdoc},
     volume = {140},
     number = {1},
     year = {1991},
     doi = {10.4064/fm-140-1-87-97},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-140-1-87-97/}
}