@article{CsuhajVarjuDassowVaszil2010,
  author    = {Erzs{\´e}bet Csuhaj-Varj{\´u} and Juergen Dassow and Gy{\"o}rgy Vaszil},
  title     = {Variants of competence-based derivations in CD grammar systems},
  doi       = {10.1142/S0129054110007428},
  url       = {http://www.worldscinet.com/ijfcs/ijfcs.shtml},
  year      = {2010},
}