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  title     = {Two new high resolution surveys for lensed quasars},
  isbn      = {1-583-81074-9},
  year      = {2001},
  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{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{WisotzkiChristliebLiuetal.2001,
  author    = {Wisotzki, Lutz and Christlieb, N. and Liu, M. C. and Maza, J. and Morgan, N. D. and Schechter, P. L.},
  title     = {Discovery of a New Multiple Gravitationally Lensed QSO},
  isbn      = {1-583-81074-9},
  year      = {2001},
  language  = {en}
}