@incollection{Sommermann2018,
  author    = {Karl-Peter Sommermann},
  title     = {The Theory of \"Essential National Policies\" in the Lisbon Judgment of the German Federal Constitutional Court},
  series = {The EU Between 'an Ever Closer Union' and Inalienable Policy Domains of Member States},
  editor    = {Thomas Giegerich and Oskar Josef Gstrein and Sebastian Zeitzmann},
  edition   = {1.},
  publisher = {Nomos},
  address   = {Baden-Baden},
  isbn      = {978-3-8487-0995-3},
  pages     = {43 -- 58},
  year      = {2018},
  abstract  = {.},
  language  = {en}
}