no. 3
The Plancherel formula for the pseudo-riemannian space SL (n,ℝ)/ GL (n-1,ℝ)
Compositio Mathematica, Tome 58 (1986) no. 3, pp. 371-397 
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     author = {Van Dijk, G. and Poel, M.},
     title = {The {Plancherel} formula for the pseudo-riemannian space $\mathrm {SL}(n, \mathbb {R}) / \mathrm {GL}(n - 1, \mathbb {R})$},
     journal = {Compositio Mathematica},
     pages = {371--397},
     year = {1986},
     publisher = {Martinus Nijhoff Publishers},
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     mrnumber = {846911},
     zbl = {0593.43009},
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Van Dijk, G.; Poel, M. The Plancherel formula for the pseudo-riemannian space $\mathrm {SL}(n, \mathbb {R}) / \mathrm {GL}(n - 1, \mathbb {R})$. Compositio Mathematica, Tome 58 (1986) no. 3, pp. 371-397. https://www.numdam.org/item/CM_1986__58_3_371_0/

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