@article{Fassbender1993,
  author    = {Faßbender, Heinz},
  title     = {Implementation of a universal unification algorithm for macro tree transducers},
  series = {Fundamentals of computation theory : proceedings / 9th International Conference, FCT '93, Szeged, Hungary, August 23 - 27, 1993. Zolt{\´a}n {\´E}sik (ed.)},
  journal   = {Fundamentals of computation theory : proceedings / 9th International Conference, FCT '93, Szeged, Hungary, August 23 - 27, 1993. Zolt{\´a}n {\´E}sik (ed.)},
  publisher = {Springer},
  address   = {Berlin [u.a.]},
  isbn      = {3-540-57163-9},
  pages     = {222 -- 233},
  year      = {1993},
  language  = {en}
}
@article{FassbenderVoglerWedel1993,
  author    = {Faßbender, Heinz and Vogler, Heiko and Wedel, Andrea},
  title     = {An abstract machine for the E-Unification with macro tree transducer},
  series = {7th International Workshop on Unification : 13. 06. - 14. 06. 93 / Franz Baader ... (eds.). [Boston University, Boston, USA]},
  journal   = {7th International Workshop on Unification : 13. 06. - 14. 06. 93 / Franz Baader ... (eds.). [Boston University, Boston, USA]},
  year      = {1993},
  language  = {en}
}