@article{10_4064_cm119_1_11,
     author = {David Swanson},
     title = {A characterization of {Sobolev} spaces via local derivatives},
     journal = {Colloquium Mathematicum},
     pages = {157--167},
     publisher = {mathdoc},
     volume = {119},
     number = {1},
     year = {2010},
     doi = {10.4064/cm119-1-11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm119-1-11/}
}