@article{10_1017_S0017089500008843,
     author = {Levasseur, Thierry},
     title = {Some properties of non-commutative regular graded rings},
     journal = {Glasgow mathematical journal},
     pages = {277--300},
     year = {1992},
     volume = {34},
     number = {3},
     doi = {10.1017/S0017089500008843},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500008843/}
}