@article{CLTM_2009_2009_1_a11,
     author = {Matusevich, Laura},
     title = {Weyl closure of hypergeometric systems.},
     journal = {Collectanea mathematica},
     pages = {147-158},
     publisher = {mathdoc},
     volume = {60},
     number = {2},
     year = {2009},
     zbl = {1180.33020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CLTM_2009_2009_1_a11/}
}