@misc{Siekmann2015,
  author    = {Helmut Siekmann},
  title     = {The legality of outright monetary transactions (OMT) of the european system of central banks},
  booktitle = {Working paper series / Institute for Monetary and Financial Stability ; 90},
  url       = {http://www.imfs-frankfurt.de/fileadmin/user_upload/IMFS_WP/IMFS_WP_90_Siekmann.pdf},
  institution = {Wirtschaftswissenschaften},
  series    = {Working paper series / Institute for Monetary and Financial Stability},
  number    = {90},
  type      = {workingpaper},
  pages     = {34},
  year        = {2015},
}