Jun Tao Xuan Zeng Wei Cai Yangfeng Su Dian Zhou Charles Chiang Stochastic Sparse-grid Collocation Algorithm (SSCA) for Periodic Steady-State Analysis of Nonlinear System with Process Variations. 474-479 2007 conf/aspdac/2007 ASP-DAC http://doi.ieeecomputersociety.org/10.1109/ASPDAC.2007.358031 db/conf/aspdac/aspdac2007.html#TaoZCSZC07