Lee H, Pak E, Suh YJ. Hopf Hypersurfaces in Complex Two-Plane Grassmannians With $\mathfrak{D}$-Parallel Shape Operator. Math. Scand. [Internet]. 2015 Dec. 14 [cited 2026 Jul. 24];117(2):217-30. Available from: https://journals.msp.org/mscand/article/view/376