@article{Heller1997,
  author    = {Heller, Klaus},
  title     = {Rechtschreibreform: Turbulenzen. Und wie weiter?},
  series = {Mitteilungen des Deutschen Germanistenverbandes},
  volume    = {44},
  number    = {4},
  publisher = {Aisthesis},
  address   = {Bielefeld},
  issn      = {0418-9426},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:mh39-80673},
  pages     = {122 -- 124},
  year      = {1997},
  language  = {de}
}
@article{Heller1997,
  author    = {Heller, Klaus},
  title     = {Wider den orthografischen Konservatismus},
  series = {Leipziger Bl{\"a}tter},
  volume    = {30},
  publisher = {Passage},
  address   = {Leipzig},
  issn      = {0232-7244},
  url       = {http://nbn-resolving.de/urn:nbn:de:bsz:mh39-84492},
  pages     = {60 -- 61},
  year      = {1997},
  language  = {de}
}