On the definition of the Galois groupoid
Équations différentielles et singularités. En l'honneur de J. M. Aroca, Astérisque no. 323  (2009), p. 441-452
@incollection{AST_2009__323__441_0,
     author = {Umemura, Hiroshi},
     title = {On the definition of the Galois groupoid},
     booktitle = {\'Equations diff\'erentielles et singularit\'es. En l'honneur de J. M. Aroca},
     editor = {Cano F. and Loray F. and Moralez-Ruiz J. J. and Sad P. and Spivakovsky M.},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {323},
     year = {2009},
     pages = {441-452},
     zbl = {1205.12005},
     mrnumber = {2647982},
     language = {en},
     url = {http://www.numdam.org/item/AST_2009__323__441_0}
}
Umemura, Hiroshi. On the definition of the Galois groupoid, in Équations différentielles et singularités. En l'honneur de J. M. Aroca, Astérisque, no. 323 (2009), pp. 441-452. http://www.numdam.org/item/AST_2009__323__441_0/

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