Wei Zeng Ying He 0001 Jiazhi Xia Xianfeng Gu Hong Qin <i>C</i><sup> INFINITY </sup> smooth freeform surfaces over hyperbolic domains. 367-372 2009 Symposium on Solid and Physical Modeling http://doi.acm.org/10.1145/1629255.1629305 conf/sma/2009 db/conf/sma/spm2009.html#ZengHXGQ09