@article{101921,
  keywords = {methods: data analysis, cosmological parameters, cosmic background radiation, cosmology: observations, methods: statistical, gravitation},
  author = {Planck Collaboration and P.~A.~R. Ade and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A.~J. Banday and R.~B. Barreiro and N. Bartolo and et al.},
  title = {Planck 2015 results. XVIII. Background geometry and topology of the Universe},
  year = {2016},
  journal = {\aap},
  volume = {594},
  pages = {A18},
  month = {09/2016},
  doi = {10.1051/0004-6361/201525829},
  language = {eng},
}