Improved bounds on partial derivatives of rational triangular Bézier surfaces. - Qian-Qian Hu; Guo-Jin Wang (Comput. Aided Des., 2007)

Representing conics by low degree rational DP curves. - Qian-Qian Hu; Guo-Jin Wang (J. Zhejiang Univ. Sci. C, 2010)

Approximating conic sections by constrained Bézier curves of arbitrary degree. - Qian-Qian Hu (J. Comput. Appl. Math., 2012)