@book {MR0450957,
    AUTHOR = {Adams, Robert A.},
     TITLE = {Sobolev spaces},
%      NOTE = {Pure and Applied Mathematics, Vol. 65},
 PUBLISHER = {Academic Press, New York-London},
      YEAR = {1975},
%     PAGES = {xviii+268},
   MRCLASS = {46E35},
  MRNUMBER = {0450957},
MRREVIEWER = {A. Kufner},
}
@book{alt2002lineare,
  title={Lineare Funktionalanalysis: Eine anwendungsorientierte Einf{\"u}hrung},
  author={Alt, H.W.},
  isbn={9783540439479},
  series={Springer Lehrbuch},
  year={2002},
  publisher={Springer}
}
@book {MR0217549,
    AUTHOR = {Bachman, George and Narici, Lawrence},
     TITLE = {Functional analysis},
 PUBLISHER = {Academic Press, New York-London},
      YEAR = {1966},
%     PAGES = {xiv+530},
   MRCLASS = {46.00 (47.00)},
  MRNUMBER = {0217549},
MRREVIEWER = {R. G. Bartle},
}
@book {MR787404,
    AUTHOR = {Deimling, Klaus},
     TITLE = {Nonlinear functional analysis},
 PUBLISHER = {Springer-Verlag, Berlin},
      YEAR = {1985},
%     PAGES = {xiv+450},
      ISBN = {3-540-13928-1},
   MRCLASS = {47-01 (47Hxx 55M25 58-01 58Cxx)},
  MRNUMBER = {787404},
MRREVIEWER = {Joachim Naumann},
       URL = {https://doi.org/10.1007/978-3-662-00547-7},
}

@book {MR1787146,
    AUTHOR = {Werner, Dirk},
     TITLE = {Funktionalanalysis},
 PUBLISHER = {Springer-Verlag, Berlin},
      YEAR = {2000},
%     PAGES = {xii+501},
      ISBN = {3-540-67645-7},
   MRCLASS = {46-01 (47-01)},
  MRNUMBER = {1787146},
MRREVIEWER = {Manfred Wolff},
}
@book {MR617913,
    AUTHOR = {Yosida, K\^osaku},
     TITLE = {Functional analysis},
    SERIES = {Grundlehren der Mathematischen Wissenschaften},
    VOLUME = {123},
 PUBLISHER = {Springer-Verlag, Berlin-New York},
      YEAR = {1980},
%     PAGES = {xii+501},
      ISBN = {3-540-10210-8},
   MRCLASS = {46-01 (47-01)},
  MRNUMBER = {617913},
}
@book {MR2380292,
    AUTHOR = {Heuser, Harro},
     TITLE = {Funktionalanalysis},
    SERIES = {Mathematische Leitf\"aden},
      NOTE = {Theorie und Anwendung},
 PUBLISHER = {B. G. Teubner, Stuttgart},
      YEAR = {2006},
%     PAGES = {696},
      ISBN = {978-3-8351-0026-8},
   MRCLASS = {46-01 (47-01)},
  MRNUMBER = {2380292},
       URL = {https://doi.org/10.1007/978-3-8351-9072-6},
}
@book {MR0365062,
    AUTHOR = {Rudin, Walter},
     TITLE = {Functional analysis},
      NOTE = {McGraw-Hill Series in Higher Mathematics},
 PUBLISHER = {McGraw-Hill Book Co., New York-D\"usseldorf-Johannesburg},
      YEAR = {1973},
%     PAGES = {xiii+397},
   MRCLASS = {46-01},
  MRNUMBER = {0365062},
MRREVIEWER = {F. Smithies},
}
@book {MR2953760,
    AUTHOR = {Meise, Reinhold and Vogt, Dietmar},
     TITLE = {Einf\"uhrung in die {F}unktionalanalysis},
 PUBLISHER = {Vieweg + Teubner Verlag, Wiesbaden},
      YEAR = {2011},
%     PAGES = {x+273},
      ISBN = {978-3-8348-1872-0},
   MRCLASS = {46-02 (46-01 46A04 46A45 46B99 47-01)},
  MRNUMBER = {2953760},
       URL = {https://doi.org/10.1007/978-3-8348-8654-5},
}
@book {MR564653,
    AUTHOR = {Taylor, Angus Ellis and Lay, David C.},
     TITLE = {Introduction to functional analysis},
 PUBLISHER = {John Wiley \&\ Sons, New York-Chichester-Brisbane},
      YEAR = {1980},
%     PAGES = {xi+467},
      ISBN = {0-471-84646-5},
   MRCLASS = {46-01 (47-01)},
  MRNUMBER = {564653},
}
		
@book {MR1347692,
    AUTHOR = {Zeidler, Eberhard},
     TITLE = {Applied functional analysis},
    SERIES = {Applied Mathematical Sciences},
    VOLUME = {109},
%      NOTE = {Main principles and their applications},
 PUBLISHER = {Springer-Verlag, New York},
      YEAR = {1995},
%     PAGES = {xvi+404},
      ISBN = {0-387-94422-2},
   MRCLASS = {00A05 (35-01 46-01 47-01 49-01 58-01)},
  MRNUMBER = {1347692},
MRREVIEWER = {Jean Mawhin},
}
@book {MR0467224,
    AUTHOR = {Wloka, Josef},
     TITLE = {Funktionalanalysis und {A}nwendungen},
%      NOTE = {de Gruyter Lehrbuch},
 PUBLISHER = {Walter de Gruyter, Berlin-New York},
      YEAR = {1971},
%     PAGES = {291},
   MRCLASS = {46-01},
  MRNUMBER = {0467224},
}
@book {MR969367,
    AUTHOR = {Dautray, Robert and Lions, Jacques-Louis},
     TITLE = {Mathematical analysis and numerical methods for science and
              technology. {V}ol. 2},
%      NOTE = {Functional and variational methods,
%              With the collaboration of Michel Artola, Marc Authier,
%              Philippe B\'enilan, Michel Cessenat, Jean Michel Combes, H\'el\`ene
%              Lanchon, Bertrand Mercier, Claude Wild and Claude Zuily,
%              Translated from the French by Ian N. Sneddon},
 PUBLISHER = {Springer-Verlag, Berlin},
      YEAR = {1988},
%     PAGES = {xvi+561},
      ISBN = {3-540-19045-7},
   MRCLASS = {00A05},
  MRNUMBER = {969367},
       URL = {https://doi.org/10.1007/978-3-642-61566-5},
}
		
@book{dobrowolski2010angewandte,
  title={Angewandte Funktionalanalysis: Funktionalanalysis, Sobolev-R{\"a}ume und elliptische Differentialgleichungen},
  author={Dobrowolski, M.},
  isbn={978-3-6421-5269-6},
  series={Springer-Lehrbuch Masterclass},
  year={2010},
  publisher={Springer Berlin Heidelberg}
}
@book{munkres2000topology,
  title={Topology},
  author={Munkres, J.R.},
  isbn={9780131784499},
  lccn={99052942},
  series={Topology},
  year={2000},
  publisher={Prentice-Hall}
}