@incollection{baumgartner2009heinrich,
  address = {Kassel},
  author = {Baumgärtner, Ingrid},
  booktitle = {Kassel Lexikon},
  editor = {Kassel, Stadt},
  interhash = {485c9079ab416478e40242dba5e35987},
  intrahash = {fd7b8ce50329157dfa95f559a29cef07},
  pages = {251-252},
  title = {Heinrich II.},
  url = {http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:de:hebis:34-2012011240293},
  volume = {Band 1. A-K},
  year = 2009
}

@incollection{baumgartner2009heirnich,
  address = {Kassel},
  author = {Baumgärtner, Ingrid},
  booktitle = {Kassel Lexikon},
  editor = {Kassel, Stadt},
  interhash = {7a00d9c58f16a10b0cbfbc7a1a871ecc},
  intrahash = {51f7698dd6cb05879bd5dbd33b8daf49},
  pages = {250-251},
  title = {Heinrich I.},
  url = {http://nbn-resolving.org/urn/resolver.pl?urn=urn:nbn:de:hebis:34-2012011240289},
  volume = {Band 1. A-K},
  year = 2009
}