1. Society as a learning system: Discovery, invention and innovation cycles revisited;Marchetti,1981
2. The Long Wave in Economic Life;Van Dujin,1983
3. Envelope curve forecasting;Ayres,1968
4. The Cognitive Paradigm;DeMey,1982
5. From timesharing to the sixth generation: The development of human-computer interaction, Part I;Gaines;Int. J. Man-Machine Studies,1986