Modelling by a Rational Spline with Interval Shape Control. - Muhammad Sarfraz 001; Muhammed Al-Mulhem; Jarallah AlGhamdi; Mohammed Abdul Raheem (Computer Graphics International, 1998)

Curve Designing Using a Rational Cubic Spline with Point and Interval Shape Control. - Muhammad Sarfraz 001; Mohammed Abdul Raheem (IV, 2000)