@article{MZ_1996__222_3_174886,
     author = {Kazuaki Taira},
     title = {Boundary value problems for elliptic integro-differential operators.},
     journal = {Mathematische Zeitschrift},
     pages = {305--328},
     year = {1996},
     volume = {222},
     number = {3},
     zbl = {0849.47024},
     url = {http://geodesic.mathdoc.fr/item/MZ_1996__222_3_174886/}
}