@incollection{Sommermann2018,
  author    = {Karl-Peter Sommermann},
  title     = {El federalismo cooperativo},
  series = {The Spanish Constitution in the European Constitutional Context},
  editor    = {Francisco Fern{\´a}ndez Segado},
  publisher = {Dykinson},
  address   = {Madrid},
  isbn      = {84-9772-094-6},
  pages     = {2279 -- 2297},
  year      = {2018},
  abstract  = {.},
  language  = {es}
}