@Article{SCI:Buz2011a,
  author =    "G.T. Buzzard and D. Xiu",
  title =     "Variance-based Global Sensitivity Analysis via
              Sparse-grid Interpolation and Cubature",
  journal =   "Communications in Computational Physics",
  volume =    "9",
  number =    "3",
  pages =     "542--567",
  year =      "2011",
  doi =       "10.4208/cicp.230909.160310s",
  keywords =  "Stochastic collocation, sparse grids, sensitivity
              analysis, Smolyak, Sobol",
  url =       "http://www.sci.utah.edu/publications/buzzard11/Buzzard_CiCP2011.pdf",
}