@article{IM2_2001_65_3_a6,
     author = {D. I. Piontkovskii},
     title = {On graded algebras of global dimension~3},
     journal = {Izvestiya. Mathematics},
     pages = {557--568},
     year = {2001},
     volume = {65},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_3_a6/}
}