@book{baumgartel,
  AUTHOR =	 {Baumg{\"a}rtel, Hellmut and Wollenberg, Manfred},
  TITLE =	 {Causal nets of operator algebras},
  PUBLISHER =	 {Akademie-Verlag},
  ADDRESS =	 {Berlin},
  YEAR =	 {1992},
}

@article{bf1,
  AUTHOR =	 {Buchholz, Detlev and Fredenhagen, Klaus},
  TITLE =	 {Locality and the structure of particle states},
  JOURNAL =	 {Comm. Math. Phys.},
  FJOURNAL =	 {Communications in Mathematical Physics},
  VOLUME =	 {84},
  YEAR =	 {1982},
  NUMBER =	 {1},
  PAGES =	 {1--54}
}

@incollection{bf2,
  AUTHOR =	 {Buchholz, Detlev and Fredenhagen, Klaus},
  TITLE =	 {Local nets of {$C\sp{\ast} $}-algebras and the
                  structure of elementary particles},
  BOOKTITLE =	 {Operator algebras and applications, Part 2
                  (Kingston, Ont., 1980)},
  SERIES =	 {Proc. Sympos. Pure Math.},
  VOLUME =	 {38},
  PAGES =	 {567--578},
  PUBLISHER =	 {Amer. Math. Soc.},
  ADDRESS =	 {Providence, R.I.},
  YEAR =	 {1982}
}

@article{dhr1,
  AUTHOR =	 {Doplicher, Sergio and Haag, Rudolf and Roberts, John
                  E.},
  TITLE =	 {Fields, observables and gauge transformations. {I}},
  JOURNAL =	 {Comm. Math. Phys.},
  VOLUME =	 {13},
  YEAR =	 {1969},
  PAGES =	 {1--23}
}

@article{dhr2,
  AUTHOR =	 {Doplicher, Sergio and Haag, Rudolf and Roberts, John
                  E.},
  TITLE =	 {Fields, observables and gauge transformations. {II}},
  JOURNAL =	 {Comm. Math. Phys.},
  VOLUME =	 {15},
  YEAR =	 {1969},
  PAGES =	 {173--200}
}

@article{dhr3,
  AUTHOR =	 {Doplicher, Sergio and Haag, Rudolf and Roberts, John
                  E.},
  TITLE =	 {Local observables and particle statistics. {I}},
  JOURNAL =	 {Comm. Math. Phys.},
  VOLUME =	 {23},
  YEAR =	 {1971},
  PAGES =	 {199--230}
}

@article{dhr4,
  AUTHOR =	 {Doplicher, Sergio and Haag, Rudolf and Roberts, John
                  E.},
  TITLE =	 {Local observables and particle statistics. {II}},
  JOURNAL =	 {Comm. Math. Phys.},
  VOLUME =	 {35},
  YEAR =	 {1974},
  PAGES =	 {49--85}
}

@article{doplicher72,
  AUTHOR =	 {Doplicher, Sergio and Roberts, John E.},
  TITLE =	 {Fields, statistics and non-abelian gauge groups},
  JOURNAL =	 {Comm. Math. Phys.},
  VOLUME =	 {28},
  YEAR =	 {1972},
  PAGES =	 {331--348}
}

@article{doplicher90,
  AUTHOR =	 {Doplicher, Sergio and Roberts, John E.},
  TITLE =	 {Why there is a field algebra with a compact gauge
                  group describing the superselection structure in
                  particle physics},
  JOURNAL =	 {Comm. Math. Phys.},
  FJOURNAL =	 {Communications in Mathematical Physics},
  VOLUME =	 {131},
  YEAR =	 {1990},
  NUMBER =	 {1},
  PAGES =	 {51--107}
}

@Unpublished{fredenhagen,
  author =	 {Fredenhagen, Klaus},
  title =	 {Superselection Sectors},
  url =          {http://www.desy.de/uni-th/lqp/psfiles/superselect.ps.gz}
}

@book{haag,
  AUTHOR =	 {Haag, Rudolf},
  TITLE =	 {Local quantum physics},
  SERIES =	 {Texts and Monographs in Physics},
  EDITION =	 {Second},
  NOTE =	 {Fields, particles, algebras},
  PUBLISHER =	 {Springer-Verlag},
  ADDRESS =	 {Berlin},
  YEAR =	 {1996}
}

@book{horuzhy,
  AUTHOR =	 {Horuzhy, S. S.},
  TITLE =	 {Introduction to algebraic quantum field theory},
  SERIES =	 {Mathematics and its Applications (Soviet Series)},
  VOLUME =	 {19},
  NOTE =	 {Translated from the Russian by K. M. Cook},
  PUBLISHER =	 {Kluwer Academic Publishers Group},
  ADDRESS =	 {Dordrecht},
  YEAR =	 {1990}
}

@incollection{roberts,
  AUTHOR =	 {Roberts, J. E.},
  TITLE =	 {Lectures on algebraic quantum field theory},
  BOOKTITLE =	 {The algebraic theory of superselection sectors
                  (Palermo, 1989)},
  PAGES =	 {1--112},
  PUBLISHER =	 {World Sci. Publishing},
  ADDRESS =	 {River Edge, NJ},
  YEAR =	 {1990}
}