The convex and concave decomposition of manifolds with real projective structures Suhyoung Choi — 1999 Mémoires de la Société Mathématique de France
Geometric structures on manifolds and holonomy-invariant metrics. Suhyoung Choi; Hyunkoo Lee — 1997 Forum mathematicum
Maximal tubes under the deformations of 3-dimensional hyperbolic cone-manifolds. Choi, Suhyoung; Lee, Jungkeun — 2006 Sibirskij Matematicheskij Zhurnal