@article{10_4064_sm214_2_5,
     author = {Yu. A. Brudnyi and I. E. Gopengauz},
     title = {Whitney type inequality, pointwise version},
     journal = {Studia Mathematica},
     pages = {167--194},
     publisher = {mathdoc},
     volume = {214},
     number = {2},
     year = {2013},
     doi = {10.4064/sm214-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm214-2-5/}
}