@article{ASNSP_1997_4_24_3_501_0,
     author = {Galanis, George N.},
     title = {On a type of linear differential equations in {Fr\'echet} spaces},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {501--510},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 24},
     number = {3},
     year = {1997},
     mrnumber = {1612393},
     zbl = {0902.34052},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1997_4_24_3_501_0/}
}