 Box, G.E.P. and G.M. Jenkins (1970) Time series analysis: Forecasting and control, San Francisco: Holden-Day.  Brockwell, Peter J. and Davis, Richard A. “Time Series: Theory and Methods”  Pankratz, Alan “Forecasting with univariate Box–Jenkins models: concepts and cases”  Investopia : http://www.investopedia.com/terms/b/box-jenkins-model.asp#ixzz1sAnHLrBe