A Note on Calculating Autocovariances of Periodic ARMA Models. - Abdelhakim Aknouche; Hacène Belbachir; Fayçal Hamdi 002 (Commun. Stat. Simul. Comput., 2008)

Yule-Walker type estimators in periodic bilinear models: strong consistency and asymptotic normality. - Abdelouahab Bibi; Abdelhakim Aknouche (Stat. Methods Appl., 2010)