@article{IM_1984__77_143159,
     author = {V. Guillemin and S. Sternberg},
     title = {Convexity properties of the moment mapping. {II.}},
     journal = {Inventiones mathematicae},
     pages = {533--546},
     publisher = {mathdoc},
     volume = {77},
     year = {1984},
     zbl = {0561.58015},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__77_143159/}
}