1. Estimates near the boundary for solutions of elliptic partial differential equations satisfying general boundary conditions I;Agmon;Comm. Pure Appl. Math.,1959
2. Estimates near the boundary for solutions of elliptic partial differential equations satisfying general boundary conditions II;Agmon;Comm. Pure Appl. Math.,1964
3. Elliptic problems with a parameter and parabolic problems of general type;Agranovich;Russian Math. Surveys,1963
4. B. Ammann, R. Lauter, V. Nistor, Pseudodifferential operators on manifolds with a Lie structure at infinity, preprint, arXiv.org, math.AP/0304044, 2003, Ann. of Math. (2), in press
5. Boundary problems for pseudo-differential operators;Boutet de Monvel;Acta Math.,1971