%0 Journal Article %A CAUSEY, RYAN MICHAEL %T CONCERNING SUMMABLE SZLENK INDEX %J Glasgow mathematical journal %D 2020 %P 59-73 %V 62 %N 1 %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089518000526/ %R 10.1017/S0017089518000526 %F 10_1017_S0017089518000526