@book{AST_2013__355__R1_0,
     author = {Ramis, Jean-Pierre and Sauloy, Jacques and Zhang, Changgui},
     title = {Local analytic classification of $q$-difference equations},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {355},
     year = {2013},
     mrnumber = {3185985},
     zbl = {1320.39008},
     language = {en},
     url = {http://archive.numdam.org/item/AST_2013__355__R1_0/}
}