대표 논문
Lorentzian ssurfaces with constant curvatures and transformations in the 3-dimensional Lorentzian space, J.KMS, 45(2008) 41-61
Lorentzian Submanifolds in Lorentzian Space Form with the Same Constant Curvatures, Geom. Ded. 108 (2004) 98-104
The Submanifold Geometries Associated to Grassmannian Systems, Memoirs A.M.S. 155 (2002) 1-95