ISHair: Importance Sampling for Hair Scattering. - Jiawei Ou; Feng Xie; Parashar Krishnamachari; Fabio Pellacini (Comput. Graph. Forum, 2012)

Importance sampling for a microcylinder based cloth bsdf. - Chunpo Wang; Feng Xie; Parashar Krishnamachari (SIGGRAPH Talks, 2014)