@Article{SCI:Xiu2002a,
  author =    "D. Xiu and G.E. Karniadakis",
  title =     "The Wiener-Askey Polynomial Chaos for Stochastic
              Differential Equations",
  journal =   "SIAM Journal on Scientific Computing",
  volume =    "24",
  number =    "2",
  pages =     "619--644",
  year =      "2002",
  doi =       "10.1137/S1064827501387826",
  keywords =  "polynomial chaos, Askey scheme, orthogonal
              polynomials, stochastic differential equations,
              spectral methods, Galerkin projection",
  url =       "http://www.sci.utah.edu/publications/xiu02/Xiu_SIAM_JSC2002.pdf",
}