%0 Journal Article %A A. K. Layek %T Intersection of essential cluster sets %J Annales Polonici Mathematici %D 1983 %P 49-55 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-41-1-49-55/ %R 10.4064/ap-41-1-49-55 %G en %F 10_4064_ap_41_1_49_55