[1] Graham P. J., Ledger A. J.: s-Regular Manifolds. In: Differential geometry, in honour of K. Yano. Tokyo 1972, 134-144. MR 0328825 | Zbl 0253.53044

[2] Kobayashi S., Nomizu K.: Foundations of Differential Geometry. N. York, London, Interscience Publishers, Vol. I (1963), Vol. II (1969). Zbl 0119.37502

13] Kowalski O.: Riemannian Manifolds with General Symmetries. Math. Z. 136 (1974), 137-150. MR 0341346

[4] Kowalski O.: Existence of Generalized Symmetric Riemannian Spaces of Arbitrary Order. J. Diff. Geometry 12 (1977), 203-208. MR 0514787

[5] Kowalski O.: Classification of Generalized Symmetric Riemannian Spaces of Dimension $n \leq 5$. Rozpravy ČSAV, Řada MPV, No 8, 85 (1975). MR 0397620 | Zbl 0343.53033

[6] Kowalski O.: Smooth and Affine s-Manifolds. Periodica Mathematica Hungarica Vol. 8(3-4), (1977), 299-311. MR 0487901 | Zbl 0313.53022

[7] Kreknin V. A.: O razrešimosti algebr Li s regularnym avtomorfizmom konečnogo poriadka. DAN SSSR, 118, 3 (1958), 436-438.

18] Ledger A. J., Obata M.: Affine and Riemannian s-Manifolds. J. Diff. Geometry 2 (1968), 451-459. MR 0244893

[9] Winter D. J.: On Groups of Automorphisms of Lie Algebras. J. Alg. 8 (1968), 131-142. MR 0223419 | Zbl 0155.06902