@article{51457,
  author       = {{Hilgert, Joachim and Hofmann, K.H.}},
  journal      = {{Monatshefte Math.}},
  pages        = {{183--210}},
  title        = {{{Lorentzian Cones in Real Lie Algebras}}},
  volume       = {{100}},
  year         = {{1985}},
}

@article{51460,
  author       = {{Hilgert, Joachim and Hofmann, K.H.}},
  journal      = {{Math. Ann.}},
  pages        = {{97--103}},
  title        = {{{Lie Semialgebras are Real Phenomena}}},
  volume       = {{270}},
  year         = {{1985}},
}

@article{51459,
  author       = {{Hilgert, Joachim and Hofmann, K.H.}},
  journal      = {{Manuscripta Math.}},
  pages        = {{17--52}},
  title        = {{{Old and New on SL(2)}}},
  volume       = {{54}},
  year         = {{1985}},
}

@article{51461,
  author       = {{Hilgert, Joachim and Hofmann, K.H.}},
  journal      = {{Semigroup Forum}},
  pages        = {{243--251}},
  title        = {{{Lie Theory of Semigroups}}},
  volume       = {{30}},
  year         = {{1984}},
}