@misc{OPUS4-28439,
  title     = {DGaaE-Nachrichten : Jahrgang 13 (1999), Heft 2},
  booktitle = {DGaaE-Nachrichten},
  volume    = {13},
  number    = {2},
  issn      = {0931-4873},
  type      = {periodicalpart},
  pages     = {21 -- 52},
  year        = {1999},
}