Zhong Li Lizhuang Ma Dereck S. Meek Wuzheng Tan Zhihong Mao Mingxi Zhao Curvature Monotony Condition for Rational Quadratic B-spline Curves. 1118-1126 2006 conf/iccsa/2006-1 ICCSA (1) http://dx.doi.org/10.1007/11751540_122 db/conf/iccsa/iccsa2006-1.html#LiMMTMZ06