[1] |
D.V. Alekseevsky, C. Medori, A. Tomassini: "Homogeneous para-Kähler Einstein manifolds", arXiv:math.DG/0806.2272 |
[2] |
D.V. Alekseevsky, C. Medori, A. Tomassini: "Maximally homogeneous para-CR manifolds of semisimple type", arXiv:math.DG/0808.0431 |