1. Advertising and Aggregate Consumption: An Analysis of Causality
2. Price forecasting and evaluation: An application in agriculture
3. L.K. Clark "Segregated Early Weaning Theory and Affects on Bacterial and Viral Diseases .". Segregated Early Weaning Theory and Affects on Bacterial and Viral Diseases , Nashville TN, 1996 .
4. K.C. Dhuyvetter "Estimating the Value of Segregated Early Weaned Pigs ."Kansas State University Cooperative Extension Service Bulletin MF-2221, 1996 .