@unpublished{ParmentierKallmeyerLichteetal.2007,
  author  = {Yannick Parmentier and Laura Kallmeyer and Timm Lichte and Wolfgang Maier},
  title   = {XMG : eXtending MetaGrammars to MCTAG},
  institution = {Extern},
  pages     = {10},
  year    = {2007},
}