@article{AIHPC_2009__26_2_689_0,
     author = {Saghin, Radu and Xia, Zhihong},
     title = {Geometric {Expansion,} {Lyapunov} {Exponents} and {Foliations}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {689--704},
     publisher = {Elsevier},
     volume = {26},
     number = {2},
     year = {2009},
     doi = {10.1016/j.anihpc.2008.07.001},
     mrnumber = {2504049},
     zbl = {1173.37031},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2008.07.001/}
}