no. 2
Global linear Goursat problems for functions of Gevrey-Lednev type
Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 23 (1969) no. 2, pp. 387-412. 
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     author = {Persson, Jan},
     title = {Global linear {Goursat} problems for functions of {Gevrey-Lednev} type},
     journal = {Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche},
     pages = {387--412},
     publisher = {Scuola normale superiore},
     volume = {Ser. 3, 23},
     number = {2},
     year = {1969},
     mrnumber = {287131},
     zbl = {0176.08801},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_1969_3_23_2_387_0/}
}
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Persson, Jan. Global linear Goursat problems for functions of Gevrey-Lednev type. Annali della Scuola Normale Superiore di Pisa - Scienze Fisiche e Matematiche, Série 3, Tome 23 (1969) no. 2, pp. 387-412. http://archive.numdam.org/item/ASNSP_1969_3_23_2_387_0/

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