1. Handbook of mathematical functions, with formulas, graphs, and mathematical tables;Abramowitz,1965
2. Principles of forecasting: a handbook for researchers and practitioners;Armstrong,2001
3. Findings from evidence-based forecasting: methods for reducing forecast error;Armstrong;International Journal of Forecasting,2006
4. Error measures for generalizing about forecasting methods: empirical comparisons;Armstrong;International Journal of Forecasting,1992
5. Toward a more precise definition of forecastability;Boylan;Foresight: The International Journal of Applied Forecasting,2009