@article{10_1090_S0894_0347_04_00453_9,
     author = {Atar, Rami and Burdzy, Krzysztof},
     title = {On {Neumann} eigenfunctions in lip domains},
     journal = {Journal of the American Mathematical Society},
     pages = {243--265},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2004},
     doi = {10.1090/S0894-0347-04-00453-9},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-04-00453-9/}
}