@article{BSMF_1989__117_2_167_0,
     author = {Borho, Walter and Brylinski, Jean-Luc},
     title = {Differential operators on homogeneous spaces. {II} : relative enveloping algebras},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {167--210},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {117},
     number = {2},
     year = {1989},
     doi = {10.24033/bsmf.2117},
     mrnumber = {90j:17023},
     zbl = {0702.22019},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2117/}
}