no. 2
Type I criteria and the Plancherel formula for Lie groups with co-compact radical
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 2, pp. 263-285. 
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     author = {Lipsman, Ronald L.},
     title = {Type {I} criteria and the {Plancherel} formula for {Lie} groups with co-compact radical},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {263--285},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 9},
     number = {2},
     year = {1982},
     mrnumber = {674975},
     zbl = {0498.43010},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1982_4_9_2_263_0/}
}
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Lipsman, Ronald L. Type I criteria and the Plancherel formula for Lie groups with co-compact radical. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 9 (1982) no. 2, pp. 263-285. http://www.numdam.org/item/ASNSP_1982_4_9_2_263_0/

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