@book{BaumgaertelJurkeLledo1994,
  author    = {Baumg{\"a}rtel, Hellmut and Jurke, Matthias and Lled{\´o}, Fernando},
  title     = {A remark on covariant and causal nets of CAR-resp.CCR-type local algebras assigned to the irreducible unitary representation of the poincare group labeled by (m>0, s, +)},
  series = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  volume    = {120},
  journal   = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  address   = {Berlin},
  year      = {1994},
  language  = {en}
}
@article{BaumgaertelJurkeLledo1995,
  author    = {Baumg{\"a}rtel, Hellmut and Jurke, Matthias and Lled{\´o}, Fernando},
  title     = {On free nets over Minkowski space},
  year      = {1995},
  language  = {en}
}
@book{Lledo1996,
  author    = {Lled{\´o}, Fernando},
  title     = {A family of examples with quantum constraints},
  series = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  volume    = {1996, 01},
  journal   = {Preprint / Universit{\"a}t Potsdam, Institut f{\"u}r Mathematik},
  publisher = {Univ.},
  address   = {Potsdam},
  pages     = {10 S.},
  year      = {1996},
  language  = {en}
}
@article{Lledo1997,
  author    = {Lled{\´o}, Fernando},
  title     = {A family of examples with quantum constraints},
  year      = {1997},
  language  = {en}
}
@article{BaumgaertelLledo1997,
  author    = {Baumg{\"a}rtel, Hellmut and Lled{\´o}, Fernando},
  title     = {Some results on superselection structures for C*-algebras with nontrivial center},
  isbn      = {981-02-3984-X},
  year      = {1997},
  language  = {en}
}
@article{BaumgaertelLledo1997,
  author    = {Baumg{\"a}rtel, Hellmut and Lled{\´o}, Fernando},
  title     = {Superselection structures for C*-algebras with nontrivial center},
  year      = {1997},
  language  = {en}
}
@phdthesis{Lledo1998,
  author    = {Lled{\´o}, Fernando},
  title     = {Algebraic properties of massless free nets},
  address   = {Potsdam},
  pages     = {101 S.},
  year      = {1998},
  language  = {en}
}
@book{BaumgaertelJurkeLledo1999,
  author    = {Baumg{\"a}rtel, Hellmut and Jurke, Matthias and Lled{\´o}, Fernando},
  title     = {Twisted duality for the CAR-algebra},
  series = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  volume    = {401},
  journal   = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  publisher = {Techn. Univ.},
  address   = {Berlin},
  year      = {1999},
  language  = {en}
}
@book{GrundlingLledo1999,
  author    = {Grundling, H. and Lled{\´o}, Fernando},
  title     = {Local quantum constraints},
  series = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  volume    = {402},
  journal   = {Preprint / SFB 288, Differentialgeometrie und Quantenphysik},
  address   = {Berlin},
  year      = {1999},
  language  = {en}
}
@misc{Lledo1999,
  author    = {Lled{\´o}, Fernando},
  title     = {Contributions to operator theory in spaces with an indefinite metric, the Heinz Langer anniversary volume, A. S. Dijksma ... eds.; Basel [u.a.], Birkh{\"a}user, 1998, ISBN 3-7643-6003-8},
  year      = {1999},
  language  = {en}
}