@article{JAC_2010__31_2_a4,
     author = {Billey, Sara C. and Mitchell, Stephen A.},
     title = {Smooth and palindromic {Schubert} varieties in affine {Grassmannians}},
     journal = {Journal of Algebraic Combinatorics},
     pages = {169--216},
     publisher = {mathdoc},
     volume = {31},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2010__31_2_a4/}
}