1. Distortion theorems for hyperbolically and spherically k-convex functions;Ma,1991
2. Distortion theorems for euclidean k-convex functions;Ma;Complex Var. Theory Appl.,1992
3. Hyperbolically 1-convex functions;Ma;Ann. Polon. Math.,2004
4. Spherical linear invariance and uniform local spherical convexity;Ma,1992
5. Hyperbolically convex functions;Ma;Ann. Polon. Math.,1994