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I. N. Bernstein , I. M. Gelfand and S. I. Gelfand . Schubert cells and cohomology of the spaces G/P. Math. Surveys 28 (1973), 3–26 (in Russian).
M. Demazure . Invariants symétrique des groupes de Weyl et torsion. Invent. Math. 21 (1973), 287–301.
H. Hiller . Combinatorics and intersection of Schubert varieties. Comment. Math. Helv. 57 (1982), 41–59.
H. Hiller and B. Boe . Pieri formula for SO2n+1/Un and Spn/Un. Advances in Math. 62 (1986), 49–67.
J. R. Stembridge . Shifted tableaux and the projective representations of symmetric groups. Advances in Math. 74 (1989), 87–134.