@article{JAC_2000__12_3_a5,
     author = {Aramova, Annetta and Herzog, J\"urgen and Hibi, Takayuki},
     title = {Shifting operations and graded {Betti} numbers},
     journal = {Journal of Algebraic Combinatorics},
     pages = {207--222},
     publisher = {mathdoc},
     volume = {12},
     number = {3},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2000__12_3_a5/}
}