@articleHilgert_Ólafsson_1992, title=Analytic Extensions of Representations, the Solvable Case, volume=18, journal=Japan. J. Math., author=Hilgert, Joachim and Ólafsson, G., year=1992, pages=213–290 
LibreCat: /record/51442

@articleHilgert_1992, title=Controllability on Real Reductive Groups, volume=209, journal=Math. Zeitschrift, author=Hilgert, Joachim, year=1992, pages=463–466 
LibreCat: /record/51443