@article{MAN_1989__285_1_164581,
     author = {So-Chin Chen},
     title = {Global regularity of the {...-Neumann} problem on circular domains.},
     journal = {Mathematische Annalen},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {285},
     number = {1},
     year = {1989},
     zbl = {0662.32016},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164581/}
}