@article{RM_1973_28_3_a0,
     author = {J. H. Bernstein and I. M. Gel'fand and S. I. Gel'fand},
     title = {Schubert cells and cohomology of the spaces $G/P$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {1--26},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1973},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_3_a0/}
}