@article{BSMF_2004__132_4_591_0,
     author = {Torrelli, Tristan},
     title = {On meromorphic functions defined by a differential system of order $1$},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {591--612},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {132},
     number = {4},
     year = {2004},
     doi = {10.24033/bsmf.2475},
     mrnumber = {2131905},
     zbl = {1080.32011},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2475/}
}