Facets of Knowledge About Natural Language Syntax Representation and Use in Parsing and Generation. - Helmut Horacek; Claudius Pyka (GWAI, 1988)

Anwendbarkeit von Unifikationsgrammatiken für effizientes Generieren. - Helmut Horacek; Claudius Pyka (ÖGAI, 1988)

Management of Hypotheses in an Integrated Speech-Language Architecture. - Claudius Pyka (ECAI, 1992)