@article{10_4153_CJM_2000_020_0,
     author = {Wallach, N. R. and Willenbring, J.},
     title = {On {Some} $q$ {-Analogs} of a {Theorem} of {Kostant-Rallis}},
     journal = {Canadian journal of mathematics},
     pages = {438--448},
     year = {2000},
     volume = {52},
     number = {2},
     doi = {10.4153/CJM-2000-020-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2000-020-0/}
}