@article{MZM_2009_85_5_a7,
     author = {M. Crupi and G. Restuccia},
     title = {Monomial {Modules} and {Graded} {Betti} {Numbers}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {721--736},
     publisher = {mathdoc},
     volume = {85},
     number = {5},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_5_a7/}
}