@article{10_4064_sm172_1_3,
     author = {Denny H. Leung and Wee-Kee Tang},
     title = {$\ell^{1}${-Spreading} models in subspaces of mixed {Tsirelson} spaces},
     journal = {Studia Mathematica},
     pages = {47--68},
     year = {2006},
     volume = {172},
     number = {1},
     doi = {10.4064/sm172-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm172-1-3/}
}