@inproceedings{Seidl88Parameter,
  author = {Helmut Seidl},
  title = {Parameter-{R}eduction of {H}igher {L}evel {G}rammars ({E}xtended {A}bstract)},
  booktitle = {Trees in Algebra and Programming},
  editor = {Max Dauchet and Maurice Nivat},
  month = {March},
  year = 1988,
  pages = {52-71},
  series = {Lecture Notes in Computer Science},
  volume = {299},
  publisher = {Springer},
  address = {Nancy, France},
}