@conference {ADF89, title = {{CONSTRUCTOR}: A natural language interface based on attribute grammars}, booktitle = {First Finnish-Hungarian Workshop on Programming Languages and Software Tools}, year = {1989}, month = {aug}, pages = {135-145}, author = {Z. Alexin and J. Dombi and K. F{\'a}bricz and Tibor Gyim{\'o}thy and T. Horv{\'a}th} }