@misc{Raupach2003,
  author    = {Peter Raupach},
  title     = {The valuation of employee stock options : how good is the standard?},
  booktitle = {Universit{\"a}t Frankfurt am Main. Fachbereich Wirtschaftswissenschaften: [Working paper series / Finance and accounting] Working paper series, Finance \& Accounting ; No. 122},
  number    = {December 21, 2003},
  institution = {Wirtschaftswissenschaften},
  series    = {Working paper series / Johann-Wolfgang-Goethe-Universit{\"a}t Frankfurt am Main, Fachbereich Wirtschaftswissenschaften : Finance \& Accounting},
  number    = {122},
  type      = {workingpaper},
  pages     = {30},
  year        = {2003},
}