Some applications of invariant differential operators on a semi simple Lie algebra
Séminaire Bourbaki : années 1956/57 - 1957/58, exposés 137-168, Séminaire Bourbaki no. 4  (1958), Talk no. 160, p. 319-326 
@incollection{SB_1956-1958__4__319_0,
     author = {Harish-Chandra},
     title = {Some applications of invariant differential operators on a semi simple Lie algebra},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1956/57 - 1957/58, expos\'es 137-168},
     author = {Collectif},
     series = {S\'eminaire Bourbaki},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {4},
     year = {1958},
     note = {talk:160},
     pages = {319-326},
     zbl = {0084.10401},
     mrnumber = {1610942},
     language = {en},
     url = {http://www.numdam.org/item/SB_1956-1958__4__319_0}
}

Harish-Chandra. Some applications of invariant differential operators on a semi simple Lie algebra, in Séminaire Bourbaki : années 1956/57 - 1957/58, exposés 137-168, Séminaire Bourbaki, no. 4 (1958), Talk no. 160, pp. 319-326. http://www.numdam.org/item/SB_1956-1958__4__319_0/

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