A generalized Ball curve and its recursive algorithm. - H. B. Said (ACM Trans. Graph., 1989)

Properties of generalized Ball curves and surfaces. - Tim N. T. Goodman; H. B. Said (Comput. Aided Des., 1991)

Shape preserving properties of the generalised ball basis. - Tim N. T. Goodman; H. B. Said (Comput. Aided Geom. Des., 1991)

A C2 triangular patch for the interpolation of functional scattered data. - L. H. T. Chang; H. B. Said (Comput. Aided Des., 1997)

A C2 Interpolant for Spherical Scattered Data. - L. H. T. Chang; H. B. Said (PG, 1998)