@article{10_1017_S0017089518000526,
     author = {CAUSEY, RYAN MICHAEL},
     title = {CONCERNING {SUMMABLE} {SZLENK} {INDEX}},
     journal = {Glasgow mathematical journal},
     pages = {59--73},
     year = {2020},
     volume = {62},
     number = {1},
     doi = {10.1017/S0017089518000526},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089518000526/}
}