@article{JEMS_2009_11_2_a2,
     author = {A. Szankowski},
     title = {Three-space problems for the approximation property},
     journal = {Journal of the European Mathematical Society},
     pages = {273--282},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {2009},
     doi = {10.4171/jems/150},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/150/}
}