@book{FassbenderVoglerWedel1994,
  author    = {Faßbender, Heinz and Vogler, Heiko and Wedel, Andrea},
  title     = {Implementation of a deterministic partial E-unification algorithm for macro tree transducers},
  publisher = {Univ. Ulm, Fak. f{\"u}r Informatik},
  address   = {Ulm},
  pages     = {62 S.},
  year      = {1994},
  language  = {en}
}
@article{FassbenderVogler1994,
  author    = {Faßbender, Heinz and Vogler, Heiko},
  title     = {A universal unification algorithm based on unification-driven leftmost outermost narrowing},
  series = {Acta Cybernetica. 11 (1994), H. 3},
  journal   = {Acta Cybernetica. 11 (1994), H. 3},
  isbn      = {0324-721x},
  pages     = {139 -- 167},
  year      = {1994},
  language  = {en}
}
@article{FassbenderVogler1994,
  author    = {Faßbender, Heinz and Vogler, Heiko},
  title     = {Implementierung eines universellen Unifikationsalgorithmus f{\"u}r Macro Tree Transducer},
  series = {Alternative Konzepte f{\"u}r Sprachen und Rechner : Bad Honnef 1993 / J. Ebert (Hrsg.)},
  journal   = {Alternative Konzepte f{\"u}r Sprachen und Rechner : Bad Honnef 1993 / J. Ebert (Hrsg.)},
  publisher = {Univ., Inst. f{\"u}r Informatik},
  address   = {Koblenz},
  pages     = {151 S.},
  year      = {1994},
  language  = {de}
}