Shape Preserving Positive Rational Trigonometric Spline Surfaces. - Muhammad Sarfraz 001; Farsia Hussain; Malik Zawwar Hussain (IV, 2015)

Shape preserving curves using quadratic trigonometric splines. - Muhammad Sarfraz 001; Malik Zawwar Hussain; Farsia Hussain (Appl. Math. Comput., 2015)

GC1 Cubic Trigonometric Spline Function with its Geometric Attributes. - Muhammad Sarfraz 001; Farsia Hussain; Saira Hussain; Malik Zawwar Hussain (IV, 2017)