@book{Rotermund2018,
  author    = {Rotermund, Uwe},
  title     = {fm benchmarking Bericht 2018},
  edition   = {300},
  publisher = {Eigenverlag},
  address   = {H{\"o}xter},
  isbn      = {978-3-00-055069-0},
  pages     = {250},
  year      = {2018},
  language  = {de}
}
@book{Rotermund2018,
  author    = {Rotermund, Uwe},
  title     = {fm.benchmarking Bericht 2019},
  editor    = {Rotermund, Uwe},
  publisher = {Eigenverlag},
  address   = {H{\"o}xter},
  isbn      = {978-3-9819229-3-6},
  publisher      = {FH M{\"u}nster - University of Applied Sciences},
  pages     = {240},
  year      = {2018},
  language  = {de}
}