In this paper we obtain two types of optimal inequalities consisting of the normalized scalar curvature and the generalized normalized $\delta$-Casorati curvatures for real hypersurfaces of complex two-plane Grassmannians and complex hyperbolic two-plane Grassmannians. We also find the conditions on which the equalities hold.
"Inequalities for the Casorati Curvatures of Real Hypersurfaces in Some Grassmannians." Taiwanese J. Math. 22 (1) 63 - 77, February, 2018. https://doi.org/10.11650/tjm/8124