@article{RM_1974_29_2_a11,
     author = {F. John},
     title = {Functions whose gradient is bounded by the reciprocal distance from the boundary of their domain},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {170--175},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_2_a11/}
}