Seasonally and Fractionally Differenced Time Series, Hitotsubashi Journal of Economics, Vol. 48, No.1, pp.25-55, 2007. The SARFIMA model includes the ARFIMA (fractional ARIMA) model and the SARIMA (seasonal ARIMA) model.
On Multiple Portmanteau Tests, Discussion Paper Series, 2008-4, Faculty of Economics, Kyushu University, 2008.