Semiprojectivity with and without a group action

@article{Phillips2014SemiprojectivityWA,
  title={Semiprojectivity with and without a group action},
  author={N. Christopher Phillips and Adam P. W. S{\o}rensen and Hannes Thiel},
  journal={Journal of Functional Analysis},
  year={2014},
  volume={268},
  pages={929-973}
}
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