%0 Journal Article %A Katarina Surla %T Determination of the Invariant Interval for Positive Linear Operators by a Nonstationary Iterative Procedure %J Publications de l'Institut Mathématique %D 1981 %P 177 %V _N_S_30 %N 44 %I mathdoc %U http://geodesic.mathdoc.fr/item/PIM_1981_N_S_30_44_a24/ %G en %F PIM_1981_N_S_30_44_a24