1. Zur Theorie des wachsenden Unternehmens, Schriften des Vereins für Socialpolitik, 34NS;Albach,1965
2. A Predictive Model for Monitoring Product Life Cycle;Balachandran,1972
3. A Probability Model for Early Prediction of New Product Market Success;Barclay;J. Marketing,1963
4. A New Product Growth Model for Consumer Durables;Bass;Man. Sci.,1969
5. The Product Life Cycle Theory Applied to Color Television;Belville,1966