@article{MAN_1989__283_1_164495,
     author = {S. Simons and B. Rodrigues},
     title = {The {Open} {Mapping} and {Closed} {Range} {Theorems.}},
     journal = {Mathematische Annalen},
     pages = {87--96},
     publisher = {mathdoc},
     volume = {283},
     number = {1},
     year = {1989},
     zbl = {0633.46007},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164495/}
}