@article{10_4064_sm8197_10_2016,
     author = {Ryan M. Causey},
     title = {Concerning the {Szlenk} index},
     journal = {Studia Mathematica},
     pages = {201--244},
     year = {2017},
     volume = {236},
     number = {3},
     doi = {10.4064/sm8197-10-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm8197-10-2016/}
}