@article{AIHPC_2011__28_4_551_0,
     author = {Canuto, B.},
     title = {A local symmetry result for linear elliptic problems with solutions changing sign},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {551--564},
     publisher = {Elsevier},
     volume = {28},
     number = {4},
     year = {2011},
     doi = {10.1016/j.anihpc.2011.03.005},
     zbl = {1242.35182},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1016/j.anihpc.2011.03.005/}
}