@article{ADM_2017_23_1_a4,
     author = {Vyacheslav Futorny and Jo\~ao Schwarz},
     title = {Galois orders of symmetric differential operators},
     journal = {Algebra and discrete mathematics},
     pages = {35--46},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2017_23_1_a4/}
}