@book{Graebsch2017,
  author    = {Graebsch, Christine},
  title     = {Supervisible},
  publisher = {Howard League for Penal Reform},
  address   = {London},
  isbn      = {978-1-911114-13-0},
  pages     = {5},
  year      = {2017},
  language  = {en}
}
@book{GraebschBurkhardt2014,
  author    = {Graebsch, Christine M. and Burkhardt, Sven-Uwe},
  title     = {Ambulant sanctions as an alternative to imprisonment in the European Union?},
  publisher = {Center for the Study of Democracy},
  address   = {Sofia},
  isbn      = {978-954-477-220-8},
  pages     = {120},
  year      = {2014},
  language  = {en}
}