@article{ASENS_1988_4_21_3_359_0,
     author = {van den Ban, E. P.},
     title = {The principal series for a reductive symmetric space. {I.} $H$-fixed distribution vectors},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {359--412},
     publisher = {Elsevier},
     volume = {Ser. 4, 21},
     number = {3},
     year = {1988},
     doi = {10.24033/asens.1562},
     mrnumber = {90a:22016},
     zbl = {0714.22009},
     language = {en},
     url = {http://www.numdam.org/articles/10.24033/asens.1562/}
}