@article{JOLT_1992_2_1_a1,
     author = {J. Hilgert},
     title = { Convexity {Properties} of {Grassmannians}},
     journal = {Journal of Lie Theory},
     pages = {13--20},
     year = {1992},
     volume = {2},
     number = {1},
     doi = {10.5802/jolt.27},
     zbl = {0782.22006},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.27/}
}