%0 Journal Article %A Anděl, Jiří %T Periodic autoregression with exogenous variables and periodic variances %J Applications of Mathematics %D 1989 %P 387-395 %V 34 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/AM.1989.104366/ %R 10.21136/AM.1989.104366 %G en %F 10_21136_AM_1989_104366