@article {MR3634453,
    AUTHOR = {Feischl, Michael and F\"{u}hrer, Thomas and Praetorius, Dirk and
              Stephan, Ernst P.},
     TITLE = {Optimal preconditioning for the symmetric and nonsymmetric
              coupling of adaptive finite elements and boundary elements},
   JOURNAL = {Numer. Methods Partial Differential Equations},
  FJOURNAL = {Numerical Methods for Partial Differential Equations. An
              International Journal},
    VOLUME = {33},
      YEAR = {2017},
    NUMBER = {3},
     PAGES = {603--632},
      ISSN = {0749-159X},
   MRCLASS = {65N22 (65N30 65N38 65N55)},
  MRNUMBER = {3634453},
       DOI = {10.1002/num.22025},
       URL = {https://doi.org/10.1002/num.22025},
}