@article{10_1017_S0017089517000155,
     author = {MAO, LIXIN},
     title = {DING-GRADED {MODULES} {AND} {GORENSTEIN} {GR-FLAT} {MODULES}},
     journal = {Glasgow mathematical journal},
     pages = {339--360},
     year = {2018},
     volume = {60},
     number = {2},
     doi = {10.1017/S0017089517000155},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089517000155/}
}