@article{AIF_2007__57_7_2239_0,
     author = {Duistermaat, Johannes Jisse and Pelayo, Alvaro},
     title = {Symplectic torus actions  with coisotropic principal orbits},
     journal = {Annales de l'Institut Fourier},
     pages = {2239--2327},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {57},
     number = {7},
     year = {2007},
     doi = {10.5802/aif.2333},
     mrnumber = {2394542},
     zbl = {1197.53114},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/aif.2333/}
}