@article {Funk1,
    AUTHOR = {Carstensen, C. and Funken, S. A.},
     TITLE = {Coupling of nonconforming finite elements and boundary
              elements. {I}. {A} priori estimates},
   JOURNAL = {Computing},
  FJOURNAL = {Computing. Archives for Scientific Computing},
    VOLUME = {62},
      YEAR = {1999},
    NUMBER = {3},
     PAGES = {229--241},
      ISSN = {0010-485X},
     CODEN = {CMPTA2},
   MRCLASS = {65N38 (65N15 65N30 65R20)},
  MRNUMBER = {1697839 (2000h:65168)},
MRREVIEWER = {Joakim Petersson},
       DOI = {10.1007/s607-1999-8334-7},
       URL = {http://dx.doi.org/10.1007/s607-1999-8334-7},
}

@incollection {Funk2,
    AUTHOR = {Erath, Christoph and Funken, Stefan and Praetorius, Dirk},
     TITLE = {Adaptive},
}

@article {Funk3,
    AUTHOR = {Erath, Christoph and Praetorius, Dirk},
     TITLE = {A posteriori},
}