@article{SMJ2_2004_30_2-3_a14,
     author = {Drensky, Vesselin},
     title = {Invariants of {Unipotent} {Transformations} {Acting} on {Noetherian} {Relatively} {Free} {Algebras}},
     journal = {Serdica Mathematical Journal},
     pages = {395--404},
     publisher = {mathdoc},
     volume = {30},
     number = {2-3},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SMJ2_2004_30_2-3_a14/}
}