1. Strategic Windows, The Time to Invest In a Product or Market Is When a ‘Strategic Window’ is Open;Abell;Journal of Marketing,1978
2. Time Lag in New Product Development;Adler;Journal of Marketing,1966
3. Managerial Marketing for Industrial Firms;Ames,1984
4. Market Development: A Comprehensive Survey;Baker,1983
5. Tracker: An Early Test Market Forecasting and Diagnostic Model for New Product Planning;Blattberg;Journal of Marketing Research,1978