@article{AIF_2009__59_7_2733_0,
     author = {Morikawa, Shuji and Umemura, Hiroshi},
     title = {On a general difference {Galois} theory {II}},
     journal = {Annales de l'Institut Fourier},
     pages = {2733--2771},
     publisher = {Association des Annales de l{\textquoteright}institut Fourier},
     volume = {59},
     number = {7},
     year = {2009},
     doi = {10.5802/aif.2506},
     zbl = {1194.12006},
     mrnumber = {2649332},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/aif.2506/}
}