Efficient substitutes for subdivision surfaces. - Tianyun Ni; Ignacio Castaño; Jörg Peters 001; Jason L. Mitchell; Philip Schneider; Vivek Verma (SIGGRAPH Courses, 2009)

Approximating subdivision surfaces with Gregory patches for hardware tessellation. - Charles T. Loop; Scott Schaefer; Tianyun Ni; Ignacio Castaño (ACM Trans. Graph., 2009)