@article{10_1090_S0894_0347_06_00553_4,
     author = {Lam, Thomas},
     title = {Schubert polynomials for the affine {Grassmannian}},
     journal = {Journal of the American Mathematical Society},
     pages = {259--281},
     year = {2008},
     volume = {21},
     number = {1},
     doi = {10.1090/S0894-0347-06-00553-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-06-00553-4/}
}