@article{JOLT_2013_23_3_a6,
     author = {M. Dawson and G. \'Olafsson and J. A. Wolf},
     title = {Direct {Systems} of {Spherical} {Functions} and {Representations}},
     journal = {Journal of Lie Theory},
     pages = {711--729},
     year = {2013},
     volume = {23},
     number = {3},
     doi = {10.5802/jolt.746},
     zbl = {1280.43003},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.746/}
}