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@article{MZ_1994__216_4_174665, author = {Richard P. Stanley}, title = {Flag f-vectors and the cd-index.}, journal = {Mathematische Zeitschrift}, pages = {483--500}, publisher = {mathdoc}, volume = {216}, number = {4}, year = {1994}, zbl = {0805.06003}, url = {http://geodesic.mathdoc.fr/item/MZ_1994__216_4_174665/} }
Richard P. Stanley. Flag f-vectors and the cd-index.. Mathematische Zeitschrift, Tome 216 (1994) no. 4, pp. 483-500. http://geodesic.mathdoc.fr/item/MZ_1994__216_4_174665/