@article{JOLT_2019_29_3_a5,
     author = {F. Kassel and T. Kobayashi},
     title = {Invariant {Differential} {Operators} on {Spherical} {Homogeneous} {Spaces} with {Overgroups}},
     journal = {Journal of Lie Theory},
     pages = {663--754},
     year = {2019},
     volume = {29},
     number = {3},
     doi = {10.5802/jolt.1076},
     zbl = {1430.16027},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.1076/}
}