@phdthesis{Jessen2007,
  author    = {Jessen, Olaf},
  title     = {"Preußens Napoleon"? : Ernst von R{\"u}chel ; 1754-1823 ; Krieg im Zeitalter der Vernunft},
  publisher = {Sch{\"o}ningh},
  address   = {Paderborn},
  isbn      = {978-3-506-75699-2},
  pages     = {490 S.},
  year      = {2007},
  language  = {de}
}