@article{MAN_1991__289_4_164767,
     author = {Richard Beals and N.K. Stanton},
     title = {Estimates on kernels for the ...-equation and the {...-Neumann} problem.},
     journal = {Mathematische Annalen},
     pages = {73--84},
     year = {1991},
     volume = {289},
     number = {4},
     zbl = {0702.35181},
     url = {http://geodesic.mathdoc.fr/item/MAN_1991__289_4_164767/}
}