Inverse estimates for elliptic boundary integral operators and their   application to the adaptive coupling of FEM and BEM
  We prove inverse-type estimates for the four classical boundary integral operators associated with the Laplace operator. These estimates are used to show convergence of an h-adaptive algorithm for the coupling of a finite element method with a boundary element method which is driven by a weighted residual error estimator. 
Markus Aurada and Michael Feischl and Thomas F\"uhrer and Michael   Karkulik and Jens Markus Melenk and Dirk Praetorius
math.NA