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3. C. Delaroche and A. Kirillov, "Sur les relations entre l'espace d'un groupe et la structure de ses sous-groupes fermés," Sém. Bourbaki, Exp. 343 (1968).
4. A. A. Kirillov, Elements of Representation Theory [in Russian], Nauka, Moscow (1972).
5. S. Lang, SL2(R), Addison—Wesley.