On the representations of reductive groups with disconnected centre
Orbites unipotentes et représentations - I. Groupes finis et Algèbres de Hecke, Astérisque no. 168  (1988), p. 157-166
@incollection{AST_1988__168__157_0,
author = {Lusztig, George},
title = {On the representations of reductive groups with disconnected centre},
booktitle = {Orbites unipotentes et repr\'esentations - I. Groupes finis et Alg\ebres de Hecke},
author = {Collectif},
series = {Ast\'erisque},
publisher = {Soci\'et\'e math\'ematique de France},
number = {168},
year = {1988},
pages = {157-166},
zbl = {0703.20036},
language = {en},
url = {http://www.numdam.org/item/AST_1988__168__157_0}
}

Lusztig, George. On the representations of reductive groups with disconnected centre, in Orbites unipotentes et représentations - I. Groupes finis et Algèbres de Hecke, Astérisque, no. 168 (1988), pp. 157-166. http://www.numdam.org/item/AST_1988__168__157_0/`

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