@article{RMI_2009_2009_1_a3,
     author = {Fefferman, C., Klartag, B.},
     title = {An example related to {Whitney} extension with almost minimal $C^m$ norm.},
     journal = {Revista matem\'atica iberoamericana},
     pages = {423-446},
     publisher = {mathdoc},
     volume = {25},
     number = {2},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RMI_2009_2009_1_a3/}
}