@article{JOLT_2019_29_2_a9,
     author = {Jan Frahm and Clemens Weiske},
     title = {Symmetry {Breaking} {Operators} for {Line} {Bundles} over {Real} {Projective} {Spaces}},
     journal = {Journal of Lie Theory},
     pages = {511--558},
     year = {2019},
     volume = {29},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JOLT_2019_29_2_a9/}
}