@misc{Gerlach2009,
  author    = {Stefan Gerlach},
  title     = {The risk of deflation},
  booktitle = {Working paper series / Institute for Monetary and Financial Stability ; 21},
  url       = {http://www.imfs-frankfurt.de/fileadmin/user_upload/pdf/Working\%20Paper_21_2009_Gerlach.pdf},
  institution = {Institute for Monetary and Financial Stability (IMFS)},
  series    = {Working paper series / Institute for Monetary and Financial Stability},
  number    = {21},
  type      = {workingpaper},
  year        = {2009},
}