Hyndman's online forecasting book https://www.otexts.org/fpp https://www.otexts.org/fpp has an ARIMA section that covers pretty much everything a practitioner w

Hyndman's online forecasting book https://www.otexts.org/fpp https://www.otexts.org/fpp has an ARIMA section that covers pretty much everything a practitioner would need.