The space of generalized formal power series solution of an ordinary differential equation
Équations différentielles et singularités. En l'honneur de J. M. Aroca, Astérisque, no. 323 (2009), pp. 61-81. 
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     author = {Cano, Jos\'e and Fortuny Ayuso, Pedro},
     title = {The space of generalized formal power series solution of an ordinary differential equation},
     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},
     pages = {61--81},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {323},
     year = {2009},
     zbl = {1272.34015},
     language = {en},
     url = {http://www.numdam.org/item/AST_2009__323__61_0/}
}
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Cano, José; Fortuny Ayuso, Pedro. The space of generalized formal power series solution of an ordinary differential equation, dans Équations différentielles et singularités. En l'honneur de J. M. Aroca, Astérisque, no. 323 (2009), pp. 61-81. http://www.numdam.org/item/AST_2009__323__61_0/

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