@incollection{Heller2018,
  author    = {Klaus Heller},
  title     = {Zum Begriff des Graphems (Res{\"u}mee)},
  series = {Beitr{\"a}ge zu Problemen der Orthographie},
  publisher = {Akademie der Wissenschaften der DDR, Zentralinstitut f{\"u}r Sprachwissenschaft},
  address   = {Berlin},
  url       = {https://nbn-resolving.org/urn:nbn:de:bsz:mh39-83979},
  pages     = {8 -- 10},
  year      = {2018},
  language  = {de}
}