@Article{rellich:der40,
  author =       "F. Rellich",
  title =        "Darstellung der {E}igenwerte von {$\Delta u + \lambda
                 u = 0$} durch ein {R}andintegral",
  journal =      "Math Z.",
  year =         "1940",
  volume =       "46",
  pages =        "635--636",
  annote =       "rellich identity",
}

@Book{zeidler:nfa88IIa,
  author =       "E. Zeidler",
  title =        "Nonlinear {F}unctional {A}nalysis",
  publisher =    "Springer Verlag",
  year =         "1988",
  volume =       "IIa",
  address =      "New York",
  annote =       "BIF",
}

@book{ lamport ,
     author =    "Leslie Lamport" ,
     title =     "\LaTeX: A Document Preparation System" ,
     publisher = "Addison--Wesley Pub.\ Co." ,
     year =      "1986" ,
     address =   "Reading, MA"
}
@book{ knuth ,
     author =    "Donald E. Knuth" ,
     title =     "The \TeX book" ,
     publisher = "Addison--Wesley Pub.\ Co." ,
     year =      "1984" ,
     address =   "Reading, MA"
}

@book{ goossens ,
     author =    "Michel Goossens and Frank Mittelbach and Alexander Samarin" ,
     title =     "The \LaTeX Companion" ,
     publisher = "Addison--Wesley Pub.\ Co." ,
     year =      "1994" ,
     address =   "Reading, MA"
}
