@article{10_1017_S0017089500031104,
     author = {Kelarev, A. V. and Okni\'nski, J.},
     title = {On group graded rings satisfying polynomial identities},
     journal = {Glasgow mathematical journal},
     pages = {205--210},
     year = {1995},
     volume = {37},
     number = {2},
     doi = {10.1017/S0017089500031104},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500031104/}
}