@article{articlea208b734,
title   = {The complexity of classifying separable Banach spaces up to isomorphism},
author = {Ferenczi, Valentin and Louveau, Alain and Rosendal, Christian},
year = {2009},
doi = {10.1112/jlms/jdn068},
journal   = {Journal of the London Mathematical Society - Second Series}
}