\bibitem{CK} D. Ciubotaru and S. Kato, Tempered modules in exotic Deligne--Langlands correspondence, \emph{Adv. Math.} \textbf{226} (2011), 1538--1590. \href{https://arxiv.org/abs/0901.3918}{arXiv:0901.3918}. \bibitem{CKK} D. Ciubotaru, M. Kato (Shiota), and S. Kato, On characters and formal degrees of discrete series of affine Hecke algebras of classical types, \emph{Invent. Math.} \textbf{187} (2012), 589--635. Revised version \href{https://arxiv.org/abs/1001.4312v4}{arXiv:1001.4312v4}. \bibitem{Kato} S. Kato, A homological study of Green polynomials, \emph{Ann. Sci. \'Ec. Norm. Sup\'er.} (4) \textbf{48} (2015), 1035--1074. \href{https://numdam.org/articles/10.24033/asens.2265/}{doi:10.24033/asens.2265}. \bibitem{LusztigCuspidalI} G. Lusztig, Cuspidal local systems and graded Hecke algebras, I, \emph{Publ. Math. Inst. Hautes \'Etudes Sci.} \textbf{67} (1988), 145--202. \href{https://doi.org/10.1007/BF02699129}{doi:10.1007/BF02699129}. \bibitem{LusztigCuspidalIII} G. Lusztig, Cuspidal local systems and graded Hecke algebras, III, \emph{Represent. Theory} \textbf{6} (2002), 202--242. \href{https://arxiv.org/abs/math/0108173}{arXiv:math/0108173}.