Erhan Ata and  H. Hilmi Hacisalihoğlu and  Yusuf Yayli,  Curvature of Almost Split Quaternion Kaehler Manifolds .   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2007, vol. 1(1). 56 - 63
    [viewed 04 May 2024]. Available from: https://publications.waset.org/pdf/3040.