@Book{Barut,
  author =       "A. O. Barut and R. Raczka",
  title =        "Theory of Group Representations and Applications",
  publisher =    "Polish Scientific Publishers",
  address =      "Warszawa",
  year =         "1977",
}

@Book{Gilmore,
  author =       "R. Gilmore",
  title =        "Lie Groups, Lie Algebras, and Some of Their Applications",
  publisher =    "Wiley",
  address =      "New York",
  year =         "1974",
}
