@article{JOLT_1993_3_2_a0,
     author = {J. Hilgert and K.-H. Neeb and W. Plank},
     title = { Symplectic {Convexity} {Theorems}},
     journal = {Journal of Lie Theory},
     pages = {123--136},
     year = {1993},
     volume = {3},
     number = {2},
     doi = {10.5802/jolt.62},
     zbl = {0862.22010},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.62/}
}