1. Research and studies in the field of manufacturing systems at University level;Peklenik,1977
2. Information requirements for the optimisation and automation of integrated manufacturing systems;Peklenik,1971
3. Einführung in die Probleme der Werkstückklassifikation;Opitz;Ind. Anz.,1967
4. Klassifizierungssystem;Opitz;Ind. Anz.,1965