1. [1] Akhiezer (D.N.), Gindikin (S.G.).— On Stein extensions of real symmetric spaces, Math. Ann., 286 p. 1-12 (1990).
2. [2] Beerends (R.J.).— The Fourier transform of Harish-Chandra’s c-function and inversion of Abel transform, Math. Ann., 277 1 p. 1-23 (1987).
3. [3] Braverman (A.), Finkelberg (M.), Kazhdan (D.).— Affine Gindikin-Karpelevich formula via Uhlenbeck spaces, arXiv:0912.5132 [math.RT] (2009).
4. [4] Braverman (A.), Garland (H.), Kazhdan (D.), Patnaik (M.).— An affine Gindikin-Karpelevich formula, arXiv:1212.6473 [math.RT] (2012).
5. [5] DeConcini (C.),Procesi (C.).— Complete symmetric varieties, Lecture Notes in Math., 996 p. 1-44 (1983).