@article{JAC_2010__32_2_a3,
     author = {Fleming, Balin and Karu, Kalle},
     title = {Hard {Lefschetz} theorem for simple polytopes},
     journal = {Journal of Algebraic Combinatorics},
     pages = {227--239},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2010__32_2_a3/}
}