@misc{OPUS4-23066,
  title     = {IWF aktuell : Nr. 23},
  booktitle = {IWF aktuell},
  volume    = {1993},
  number    = {23 = November 1993},
  issn      = {0940-7561},
  type      = {periodicalpart},
  year        = {2012},
}