Mass determination of groups of galaxies: Effects of the cosmological constant

@article{Peirani2005MassDO,
  title={Mass determination of groups of galaxies: Effects of the cosmological constant},
  author={S{\'e}bastien Peirani and Jos{\'e} Antonio Freitas Pacheco},
  journal={New Astronomy},
  year={2005},
  volume={11},
  pages={325-330}
}

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