Einstein Complete Intersections in Complex Projektive Space. Jun-ichi Hano — 1975 Mathematische Annalen
On Isometric Immersions of the Hyperbolic Plane Into the Lorentz-Minkowski Space and the Monge-Ampère Equation of a Certain Type. Katsumi Nomizu; Jun-ichi Hano — 1983 Mathematische Annalen