@article{AFST_2007_6_16_3_665_0,
     author = {van der Put, Marius and Reversat, Marc},
     title = {Galois theory of $q$-difference equations},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {665--718},
     publisher = {Universit\'e Paul Sabatier, Institut de math\'ematiques},
     address = {Toulouse},
     volume = {Ser. 6, 16},
     number = {3},
     year = {2007},
     doi = {10.5802/afst.1164},
     mrnumber = {2379057},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/afst.1164/}
}