@article{PenaHamannKoesterkeetal.1997,
  author    = {Pena, M. and Hamann, Wolf-Rainer and Koesterke, Lars and Maza, J. and Mendez, R. H. and Peimbert, M. and Ruiz, M. T. and Torres-Peimbert, S.},
  title     = {HST spectrophotometric data of the central star of the planetary nebula LMC-N66},
  year      = {1997},
  language  = {en}
}
@article{KoesterkeHamann1997,
  author    = {Koesterke, Lars and Hamann, Wolf-Rainer},
  title     = {Quantitative spectral analyses of CSPNs of early [WC]-type},
  year      = {1997},
  language  = {en}
}
@article{Hamann1997,
  author    = {Hamann, Wolf-Rainer},
  title     = {Spectra of Wolf-Rayet type central stars and their analysis},
  year      = {1997},
  language  = {en}
}
@article{PenaHamannKoesterkeetal.1997,
  author    = {Pena, M. and Hamann, Wolf-Rainer and Koesterke, Lars and Maza, J. and Mendez, R. H. and Peimbert, M. and Ruiz, M. T. and Torres-Peimbert, S.},
  title     = {Spectrophotometric data of the central star of the large magellanic cloud planetary nebula N66. Quantitative analysis of its WN type spectrum},
  year      = {1997},
  language  = {en}
}
@article{KoesterkeHamann1997,
  author    = {Koesterke, Lars and Hamann, Wolf-Rainer},
  title     = {Spectral analyses of central of planetary nebulae of early WC-type / NGC 6751 and Sanduleak 3},
  year      = {1997},
  language  = {en}
}
@article{LeuenhagenHamann1998,
  author    = {Leuenhagen, U. and Hamann, Wolf-Rainer},
  title     = {Spectral analyses of late-type [WC] central stars of planetary nebulae : more empirical constraints for their evolutionary status},
  year      = {1998},
  language  = {en}
}
@article{HamannKoesterke1998,
  author    = {Hamann, Wolf-Rainer and Koesterke, Lars},
  title     = {The nitrogen spectra of Wolf-Rayet stars},
  year      = {1998},
  language  = {en}
}
@article{HamannKoesterke1998,
  author    = {Hamann, Wolf-Rainer and Koesterke, Lars},
  title     = {Spectrum formation in clumped stellar winds : consequences for the analyses of Wolf-Rayet spectra},
  year      = {1998},
  language  = {en}
}
@article{GraefenerHamannHillieretal.1998,
  author    = {Gr{\"a}fener, G{\"o}tz and Hamann, Wolf-Rainer and Hillier, D. J. and Koesterke, Lars},
  title     = {Spectral analyses of WC stars in the LMC},
  year      = {1998},
  language  = {en}
}
@article{HamannKoesterke1999,
  author    = {Hamann, Wolf-Rainer and Koesterke, Lars},
  title     = {Spectral analyses of Wolf-Rayet stars : the impact of clumping},
  year      = {1999},
  language  = {en}
}