@article{10_4064_sm_61_2_161_191,
     author = {N. Kalton},
     title = {Universal spaces and universal bases in metric spaces},
     journal = {Studia Mathematica},
     pages = {161--191},
     publisher = {mathdoc},
     volume = {61},
     number = {2},
     year = {1977},
     doi = {10.4064/sm-61-2-161-191},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-61-2-161-191/}
}